: 34-14, Maehama, Hiroishi-cho, Gamagori, Aichi , Japan (Manufacturer) Telephone: (0533) Facsimile: (0533) : 6th Floor,

Transcription

1 NIDEK CO., LTD. : 34-14, Maehama, Hiroishi-cho, Gamagori, Aichi , Japan (Manufacturer) Telephone: (0533) Facsimile: (0533) NIDEK CO., LTD : 6th Floor, Takahashi Bldg., No.2, 3-chome, Kanda-jinboucho (Tokyo Office) Chiyoda-ku, Tokyo , Japan Telephone: (03) Facsimile: (03) Telex: NIDEK J NIDEK INCORPORATED : Westinghouse Drive, Fremont, California 94539, U. S. A. (United States Agent) Telephone: (510) Facsimile: (510) NIDEK SOCIETE ANONYME : Europarc 13, rue Auguste Perret, CRETEIL, France (Authorized Representative) Telephone: (01) Facsimile: (01) March P902E Printed in JAPAN

2 NIDEK AUTO REF/KERATOMETER Model ARK-730A OPERATOR S MANUAL

3 BEFORE USE OR MAINTENANCE, READ THIS MANUAL. This Operator s Manual contains information necessary for the operation of the NIDEK AUTO REF/KERATOMETER Model ARK-730A. This manual includes the operating procedures, safety precautions, specifications, and information about accessories and maintenance. The device complies with ISO (Ophthalmic devices Eye Refractometers). IEC and UL standards are applied in this manual. The dioptric powers are indicated with a reference of wavelength λd = nm. This manual is necessary for proper use. Especially, the safety precautions and operating procedures must be thoroughly understood prior to operation of the device. Keep this manual handy for reference. There are no user-serviceable parts inside the device except printer paper and fuses. Therefore, if you encounter any problems or have questions about the device, please contact NIDEK or your authorized distributor. MEDICAL ELECTRICAL EQUIPMENT 34VK UL CAN/CSA C22.2 NO WITH RESPECT TO ELECTRICAL SHOCK, FIRE AND MECHANICAL HAZARDS ONLY IN ACCORDANCE WITH UL6060l-1 AND CAN/CSA C22.2 NO (This applies to products whose power source is 100/120 Vac.)

4 Table of Contents 1 INTRODUCTION Outline of the Device Indications for Use Classifications Symbol Information SAFETY Cautions in Storage, Transportation and Installation Connecting the Device to a Wall Outlet and Handling the Power Cord Cautions during Use Maintenance Disposal Labels CONFIGURATION OPERATING PROCEDURES Operation Flow Auto-Off Mode Preparation for Measurement AR (refractive error), KM (corneal curvature radius) Measurements When both auto-tracking and auto-shot are ON When both auto-tracking and auto-shot are OFF When auto-tracking is ON and auto-shot is OFF CS (Corneal Size) Measurement PS (Pupil Size) Measurement PD (Pupillary Distance) Measurement Measuring Sagittal Radius PRINTOUT Printing Measured Data Eyeprint DATA TRANSFER USING EYE CARE CARD SYSTEM Writing Measured Data to the Eye Care Card Importing LM Data to be Used for the View Comparison Function Erasing Data on the Eye Care Card ENTERING PATIENT ID USING BARCODE SCANNER Connecting the Barcode Scanner Reading a Patient ID Page

5 Page 8 VARIOUS SETTINGS Setting Parameters Setting Date and Time Entering Comments Measuring Hard Contact Lenses TROUBLESHOOTING GUIDE MAINTENANCE Replacing the Printer Paper Setting a Stack of Chinrest Paper Replacing Fuses Cleaning the Measuring Window Cleaning the Exterior List of Replacement Parts SPECIFICATIONS Specifications Accessories Standard accessories Optional accessories EMC (ELECTROMAGNETIC COMPATIBILITY) APPENDIX A. GLOSSARY... A-1 INDEX... End of this manual

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7 1 INTRODUCTION 1.1 Outline of the Device The ARK-730A is an auto ref/keratometer which contains both a refractometer and a keratometer in one unit. The refractometer objectively measures the refractive errors of sphere, cylinder, and axis for the lens that corrects the patient s vision into emmetropia. The keratometer measures the corneal curvature radius, corneal refractive power, corneal cylindrical power, and corneal cylinder axis. Weak infrared rays are used for these measurements. This device has a main body and a measuring unit integrated on one base. On the base are a chinrest on the patient s side and a printer on the operator s side which outputs measured results. On the main body are a TV monitor, a control panel, and a joystick, which are used to make alignment and perform operations. The measuring unit has a measuring window into which the patient looks and where the infrared ray radiates on the patient s eye. Also, there is an autotracking mechanism, which automatically moves the measuring unit up, down, right, left, back and forth to follow the eye movement, and an auto-shot function, which automatically takes serial measurements when the device is in focus. 1.2 Indications for Use The Auto-Ref/Keratometer ARK-730A is used to measure the refractive errors such as sphere, cylinder and its axis as well as corneal radius of curvature of the eye. The measured values are mainly used for the prescription of refractive correction with spectacle lenses or contact lenses. 1.3 Classifications [Classification under the provision of 93/42/EEC (MDD)] Class IIa The ARK-730A is classified as Class IIa. [Form of protection against electric shock] Class I The ARK-730A is classified as Class I. A Class I is a device in which the protection against electric shock does not rely on basic insulation only, but which includes an additional safety precaution in such a way that means are provided for the connection of the device to the protective (ground) conductor in the fixed wiring of the installation in such a way that accessible metal parts cannot become live in the event of a failure in the basic insulation. Use a power outlet which is equipped with a grounding terminal. [Degree of protection against electric shock] Type B Applied Part The ARK-730A is classified as a device with a Type B Applied Part. A Type B Applied Part provides a particular degree of protection against electric shock, particularly regarding the following: - allowable leakage currents - reliability of the protective earth connection (if present)

8 1-2 [Degree of protection against ingress of liquids] IP 20 The ARK-730A is classified as IP20* 1. The ARK-730A is an ordinary device, as such does not provide protection with respect to harmful effects due to the ingress of water although it is protected against access to hazardous parts with a solid matter such as a finger of 12.5 mm in diameter. Avoid exposing water to the device. [Degree of protection against flammability] The ARK-730A is classified as a device not suitable to be used in a potentially flammable environment. Do not use near flammable materials. [Method(s) of sterilization or disinfection recommended by the manufacturer] The forehead rest and chinrest should be wiped using a cloth dampened with alcohol as necessary. [Mode of operation] Classification of the ARK-730A: continuous operation *1 In accordance with IEC 60529

9 Symbol Information This symbol indicates that important descriptions are contained in the operator s manual and that the operator must refer to the operator s manual prior to operation or maintenance. This symbol indicates that the degree of protection against electric shock is of a Type B Applied Part. This symbol of the power switch indicates that when the switch is pressed to this symbol side, power is supplied to the device. This symbol of the power switch indicates that when the switch is pressed to this symbol side, power is not supplied to the device. This symbol indicates the fuse rating. This symbol indicates the input port. This symbol indicates the output port. This indicates that the device must be supplied only with alternating current. This indicates the knob for adjusting the contrast. This indicates the knob for adjusting the brightness.

10 2 SAFETY The following safety precautions should always be followed. In this manual, a signal word is used to designate the degree or level of safety alerting. The definition is as follows: CAUTION: Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury or property damage accident. Even situations indicated by CAUTION may result in serious injury under certain conditions. Safety precautions must be strictly followed at all times. 2.1 Cautions in Storage, Transportation and Installation CAUTION The following environmental conditions must be maintained in storage (on the condition that the device is packed). - Place that is not exposed to rain or water. - Place that is free from harmful gas or liquid. - Place that does not contain salt, sulfur content or thick dust. - Place that is not exposed to direct sunlight. - Temperature: 20 to 60ºC, Humidity: 10 to 95% (Non-condensing) Do not drag the device by its cables. Injury or device damage may result. The device must be carried by two persons with its base held with their both hands from both sides of the device. Never hold the forehead rest, main body or measuring unit. Injury or device damage may result if the device is carried by one person or areas other than the base are held. To transport the device to another location, store it in a shipping carton. In such cases, never lock the main body with the locking knob. Breakdown of the device may result if it is subjected to excessive vibration or shock. Connect the power cord and interface cable on a stable, level place with enough space since the power inlet and interface connectors are provided at the base of the device. Install the device in a place that will never be exposed to water. If water gets into the internal structure of the device, electric shock or device malfunction may result.

11 CAUTION The installation location must satisfy the following environmental conditions: - Place with low dust content - Place with less light interference - Stable, level place that is free from vibration or shock The device may not perform measurement properly or may malfunction. In addition, if the device falls because of any accidental shock, injury may result. Install and use the device in an environment that can be maintained under the following conditions: Temperature: 10 to 35ºC Humidity: 30 to 75% (Non-condensing) Atmospheric pressure: 800 to 1060 hpa This device has been tested and found to comply with the limits for medical devices to the IEC : 2001, EN55011: 2000, Class B, Group 1. These limits are designed to provide reasonable protection against harmful interference in a typical medical installation. This device generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to other devices in the vicinity. However, there is no guarantee that interference will not occur in a particular installation. If this device does cause harmful interference to other devices, which can be determined by turning the device off and on, the user is encouraged to try to correct the interference by one or more of the following measures: - Reorient or relocate the receiving device - Increase the separation between the devices. - Connect the device into an outlet on a circuit different from that to which the other device (s) are connected. - Consult the manufacturer or field service technician for help. 2-2

12 2-3 CAUTION In installation and operation of the device, observe the following instructions about EMC (electromagnetic compatibility): - Do not use the device simultaneously with other electronic equipment to avoid electromagnetic interference with the operation of the device. - Do not use the device near, on, or under other electronic equipment to avoid electromagnetic interference with the operation of the device. - Do not use the device in the same room with other equipment such as life-support equipment, other equipment that has major affects on the life of the patient and results of treatment, or other measurement or treatment equipment that involves small electric current. - Do not use the device simultaneously with portable and mobile radio frequency communication systems because it may have an adverse effect on operation of the device. - Do not use cables and accessories that are not specified for the device because that may increase the emission of electromagnetic waves from the device or the system and decrease the immunity of the device to electromagnetic disturbance. The Electromagnetic Compatibility Directive sets the essential requirements for electrical and electronic equipment that may disturb, or be disturbed by, other equipment. The ARK-730A complies with these requirements as tabled on pages 12-1 to Follow the guidance in the tables for use of the device in an electromagnetic environment.

13 Connecting the Device to a Wall Outlet and Handling the Power Cord CAUTION Be sure to use a (HOSPITAL GRADE) wall outlet equipped with a grounding terminal in order to avoid electric shock or fire in the event of power leak. Be sure to use an outlet equipped with a grounding terminal which meets the specified power requirements. The device may not deliver full performance, or malfunction or fire may result. In addition, if the outlet is not equipped with a grounding terminal, there is a fear of electric shock in the event of power leak. Securely connect the mains plug into an outlet. Insecure connection may result in fire. To disconnect the mains plug, hold it. If the power cord is pulled, short circuit or electric shock may result in case of break in the wires inside the power cord. Never put heavy objects on the power cord nor catch the cord between any objects. The cover of the power cord may become worn and fire or electric shock may result. If the metal core of the power cord is exposed, the power turns on and off by shaking the power cord, or cord or plug gets so heated that one cannot hold it, it means that the cord is damaged. Replace the power cord immediately. Electric shock or fire may result. Wipe between the prongs of the mains plug with a dry cloth occasionally. If dust settles between the prongs, the dust easily takes up moisture, and short circuit and fire may result. If the device will not be used for a long time, disconnect the power cord from the wall outlet. Fire may result.

14 Cautions during Use CAUTION Do not use the device for other than the intended purpose. NIDEK is not responsible for accidents or malfunction caused by misuse. Never disassemble nor touch the inside of the device. Electric shock or device malfunction may result. In advance of measurement of each patient, wipe the forehead rest and chinrest with a clean cloth such as gauze. If necessary, wipe the forehead rest and chinrest using a cloth dampened with rubbing alcohol. Keep fingerprints and dust off of the measuring window. Reliability of the measured data may be lowered substantially. When the device is not in use, turn it off and place the cover over the device. If the device is not covered, dust may accumulate and affect measurement accuracy. In the event of failure in the device, do not touch the inside of the device, but disconnect the power cord from the outlet and contact NIDEK or your authorized distributor

15 CAUTION Information on the avoidance of overexposure to potentially hazardous optical radiation (ISO 15004: 1997) Spectrally weighted photochemical radiances L B and L A give a measure of the potential that exists for a beam of light to cause photochemical hazard to the retina. L B gives the measure for eyes in which the crystalline lens is in place. L A gives this measure either for eyes in which the crystalline lens has been removed (aphakes) and has not been replaced by a UV-blocking lens or for the eyes of very young children. The value stated for this ophthalmic device gives a measure of hazard potential when the device is operated at maximum intensity and maximum aperture. The values of L A or L B for the ARK-730A are sufficiently low as shown on the following page. The retinal exposure dose for a photochemical hazard is a product of the radiance and the exposure time. For instance, at a radiance level of 1 mw/(cm 2 sr), 240 min irradiation of the dilated (8 mm diameter) pupil would cause the retinal exposure dose level to attain the recommended exposure limit. If the value of radiance were reduced to 0.1 mw/(cm 2 sr), ten times that time (i.e min) would be needed to reach the recommended limit. The recommended exposure dose is based on calculations arising from the American Conference of Governmental Industrial Hygienists (ACGIH) - Threshold Limit Values for Chemical Substances and Physical Agents ( edition). The following page shows the graph of spectrum output for the ARK-730A. Patients will be at low risk of acute optical radiation with the ARK-730A. However, it is recommended that the intensity of light directed into the patient s eye be limited to the minimum level which is necessary for diagnosis. The total of the retinal exposure dose must be carefully watched for infants, aphakes and persons with diseased eyes who are at greater risk when other ophthalmic devices with a high level of radiance are used in conjunction. 2-6

16 2-7 CAUTION Spectrum output of all light source during AR measurement (maximum light intensity) ARK-710A / 光放射エネルキ ー / AR 測定時 7 6 放射照度 :(μw/c m2 ) Irradiance: Spectrum irradiance * 1 * Wavelength: 波長 :(nm) L A (µw/cm 2 /sr) nm L B (µw/cm 2 /sr) nm Spectrum output of all light source during KM measurement (maximum light intensity) ARK-710A / 光放射エネルキ ー / KM 測定時 7 6 放射照度 :(μw/c m2 ) Irradiance: Spectrum irradiance * 1 * Wavelength: 波長 :(nm) L A (µw/cm 2 /sr) nm L B (µw/cm 2 /sr) nm * 1 L A : Spectrally weighted photochemical aphakic source radiance * 2 L B : Spectrally weighted photochemical phakic source radiance

17 2-8 Patient environment The patient environment represents a space where there is a possibility of direct contact between the patient or the operator and third person. When another type of device is used in the patient environment, use a device that complies with IEC If the devices that do not comply with IEC are used, it is necessary to use an isolating transformer to power the device or to connect the devices to additional protective grounding. Radius of 1.5 m 2.5 m 1.5 m 1.5 m

18 Maintenance CAUTION Before fuse replacement, turn the device off and disconnect the power cord from the wall outlet. Electric shock may result. Replace the fuses with the specified fuses only. Fire may result. Never use an organic solvent such as paint thinner to wipe off the exterior. This may ruin the surface. Service work should be performed only by service persons authorized by NIDEK. NIDEK is not responsible for any accidents resulted from improper servicing. When the device is not in use, turn off the power switch and place a cover over the device. If the device is not covered, dust may affect measurement accuracy. When the device is sent back to NIDEK for repair or maintenance, wipe the surface (especially, the area where the patient s skin contacts) of the device with a clean cloth immersed in ethyl alcohol for disinfection. Contact NIDEK or your authorized distributor to check whether the device needs measurement accuracy calibration if the AR-measured results are largely different from the subjective measurements. NIDEK is not responsible for any accidents resulted from improper servicing. 2.5 Disposal NOTE Follow local governing ordinances and recycling plans regarding disposal or recycling of device components. The device contains the circuit board with the lithium battery. Because the disposal method of lithium batteries varies according to the government, follow the local governing ordinates and recycling plans when disposing of the circuit board with the lithium battery. When disposing of packing materials, sort them by material and follow local governing ordinances and recycling plans.

19 Labels The following labels and indications are affixed to draw the operator s attention. or or (Only marketed for NIDEK INCORPORATED) or or

20 3 CONFIGURATION Measuring unit Main body Start button Joystick Memory indicator Print button (clear button) Change button R/K button IOL button Power switch TV monitor Display panel Auxiliary button cover Locking knob Base unit Printer 3D auto button UP button View Comparison button DOWN button TV monitor Displays the patient s eye, target, focusing indicator, KM measured data (corneal curvature radius), measurement count, and mire ring projected on the patient s eye. Display panel Displays measured data of AR (refractive error), CS (Corneal Size), PS (Pupil Size), and PD (Pupillary Distance) measurements. SPH: Spherical power CYL: Cylindrical power AXIS: Cylinder axis The R (right) or L (left) indicator shows the eye to be measured as well as the eye of measured data on the display. Auxiliary button cover Used to cover the buttons that are seldom used. See page 3-5 for details of the buttons inside the cover. Locking knob Used to fix the main body to the base unit. To lock the main body, bring it to the center of the base unit and turn the knob counterclockwise while holding it down. To temporarily lock the body at any position, turn the knob clockwise. Do not lock the main body with this locking knob during transportation. Otherwise, breakdown of the device may result.

21 3-2 Used to move the guidelines on the TV monitor during CS and PS measurements. It is also used to change parameter settings, date & time settings and enter comments. Used for the comparison function. Changes the current viewing condition (unaided eye or corrected with glasses that the patient uses) and the viewing condition corrected according to AR measurement. Used to check the viewing condition for near vision. Pressing this button again returns the device to its original state. It is also used to move the guidelines on the TV monitor during CS and PS measurements, and change parameter settings, date & time settings and enter comments. Changes between ON and OFF of the autotracking and auto-shot functions. Used when an IOL-implanted eye or an eye with a contact lens is measured. If such eyes are measured without turning on the IOL mode, an error may appear and measurement may not be completed. Used to change from AR/KM measurement to CS/PS/PD measurement. By pressing this button, the mode changes in the order of CS, PS, Manual PD, CS.... (To change back from CS/PS/ PD measurements to AR/KM measurements, press.) Prints measured results. Holding down this button for 2 seconds does not print but clears measured data. Memory indicator Indicates that measured data is being stored in the memory. Illuminated: Being stored Not illuminated: Not being stored Flashing: Auto-off mode Joystick Used to move the main body right, left, back and forth. Manipulating the lever moves the main body right, left, back and forth. Turning the upper part of the lever moves the measuring unit up and down. Start button Used to start AR, KM, and PD measurements. It is also used to change the item number of system parameters. Used to change modes to select whether to perform AR measurement and KM measurement in succession or separately. The mode changes in the order of R/K mode (AR and KM in succession), R mode (AR measurement), K mode (KM measurement) R/K mode....

22 3-3 Auto-shot ON mark Auto-tracking ON mark Mire ring Cylinder mode indication Focusing indicator Measurement mode Measurement count KM measurement (Latest values) R1: Flattest meridian R2: Steepest meridian AXIS: Corneal cylinder axis [Measurement Screen] Target Min. pupil marker COMPARE indication Data to be compared with AR-measured data [Screen during View Comparison] AR-measured data SPH: Spherical power CYL: Cylindrical power AXIS: Cylinder axis

23 3-4 Auto-shot ON mark Shows that the auto-shot function is active. Auto-tracking ON mark Shows that the auto-tracking function (up, down, left and right) and/or auto-focusing function are active. Mire ring Used as a reference ring for alignment. When the auto-tracking function is on, bring this ring close to the target so that the device automatically starts alignment. When the auto-tracking function is off, place the ring concentric with the target. The ring can also be used to observe the shape of the corneal surface. Cylinder mode indication Indicates the current cylinder mode. COMPARE indication Indicates that the View Comparison function is active. Data to be compared with AR-measured data Unaided eye LM Patient s glasses When data of the patient s glasses is transferred from a lensmeter, the dioptric powers of the glasses will be shown. When the patient looks at the chart with these dioptric powers, or LM on the left of the monitor will flash. AR-measured data Indicates median values or latest values. When the patient looks at the chart with these dioptric powers, AR on the left of the TV monitor will flash. Focusing indicator Indicates the distance between the measuring unit and the patient s eye when the auto-tracking function is on. Target Used as a guide to place the patient s eye in the center of the TV monitor during AR and KM measurements. Min. pupil marker Indicates the minimum pupil size measurable. The device may not perform measurement when the pupil size is smaller than this marker or eyelashes are within this marker.

24 3-5 Contrast control Brightness control Setting button CYL mode change button Eyeprint button [Auxiliary Buttons]

25 3-6 Contrast control Used to adjust the contrast of the TV monitor. Brightness control Used to adjust the brightness of the TV monitor. Used to set system parameters, date and time, and enter comments. Prints the eyeprint view of measured data. The eyeprint is printed out regardless of its parameter setting. It is also used to change parameter settings, date & time settings and enter comments. Changes the cylinder mode, the reading direction of cylinder data. + mode...cylinder data will be indicated by a + reading. mode...cylinder data will be indicated by a reading. MIX mode..cylinder data will be indicated by a + reading when the refractive error is positive for any meridian. In other cases, cyl. data will be indicated by a reading. The cylinder mode can be changed even after measurement. Data will be printed out with the mode status at the time of printing.

26 3-7 Forehead rest Measuring window Eye level marker LED for corneal illumination Chinrest PD window Chinrest knob [Top view] TV monitor H control TV monitor V control [Underside view] Interface connectors Power inlet Fuses [Underside]

27 3-8 Measuring window Patient looks at the chart through this window. Eye level marker Used as a guide for the patient s eye level for measurement. The height of the chinrest should be adjusted so that the center of the patient s eye almost aligns with this line. Chinrest knob Turning the chinrest moves the chinrest up and down. Use the eye level marker as a guide to adjust the patient s eye level to a comfortable height for measurement. Interface connectors* 1 side: Connect the interface cable to transfer measured data to a NIDEK refractor. The optional Eye Care card system is connected to this side. side: Connect the interface cable from a NIDEK lensmeter to import measured data.* 2 To read a patient ID using the optional barcode scanner, it is connected to this side.* 3 By connecting the lensmeter to the side and the refractor to the side, LM data can be transferred to the refractor via the ARK. Pressing the print button on the lensmeter starts data transfer. TV monitor H control* 4 Adjusted with a screwdriver when the TV monitor does not lock horizontally. Can be found on the underside of the main body. TV monitor V control* 4 Adjusted with a screwdriver when the TV monitor does not lock vertically. Can be found on the underside of the main body. *1 Accessory equipment connected to the analog and digital interfaces must be certified according to the representative appropriate national standards (for example, UL 1950 for Data Processing Equipment UL for Medical Equipment, and CSA C22.2 No , EN , and IEC ) Furthermore, all configurations shall comply with the system standard IEC Anyone who connects additional equipment to the signal input part or signal output part configures a medical system, and is therefore responsible that the system complies with the requirements of the system standard IEC If in doubt, consult the technical service department or your local representative. *2 When communicating with a lensmeter, set communication parameters for each device as follows: For the setting procedure, see the Operator s Manual of each device. ARK-730A NIDEK Lensmeter 53: Baud Rate = 9600 RS-232C = NIDEK Data Bits = 8 54: Bit Length = 8 Baud Rate = 9600 Stop Bits = 1 56: IN Port Sel. = LM Parity = Odd *3 When connecting the optional barcode scanner, set parameters as follows: See 8.1 Setting Parameters (p. 8-1). 53: Baud Rate = : Bit Length = 8 56: IN Port Sel. = Barcode *4 The LCD type monitor is not provided with these controls.

28 4 4.1 Operation Flow Power ON 4.3 Preparation for Measurement (p. 4-2) Measurements 4.4 AR (refractive error), KM (corneal curvature radius) Measurements When both auto-tracking and auto-shot are ON (p. 4-6) When both auto-tracking and auto-shot are OFF (p. 4-14) When auto-tracking is ON and auto-shot is OFF (p. 4-16) 4.5 CS (Corneal Size) Measurement (p. 4-17) 4.6 PS (Pupil Size) Measurement (p. 4-19) 4.7 PD (Pupillary Distance) Measurement (p. 4-21) 4.8 Measuring Sagittal Radius (p. 4-23) 5. PRINT OUT (p. 5-1) Power OFF OPERATING PROCEDURES (Determine final prescription by subjective refraction.) 4.2 Auto-Off Mode The device will go into the auto-off mode automatically to save power if no operation is performed for five minutes* 1. OFF The auto-off mode places the device into the following conditions: Time The TV monitor goes off. Flashing Time appears on the display panel. The memory indicator flashes. The device recovers to the normal mode from the auto-off mode by the following methods: Press any switch. Manipulate the joystick to move the base R or L. NOTE The device may not go into the auto-off mode depending on the condition of the screen. When the device goes into the auto-off mode from the Comparison View function screen, it will recover to the normal mode. (Only when the Compare SW parameter is set to Manu. ) When the device goes into the auto-off mode from the screen of CS, PS or PD measurement, it will recover to the normal mode. *1 Time to activate the auto-off mode can be changed. The parameter setting can be set so that the auto-off mode will not activate. See 8.1 Setting Parameters (p. 8-1).

29 Preparation for Measurement Auto-shot ON mark Auto-tracking ON mark 1. Turn on the power switch. The display panel is indicated as shown on the right. On the TV monitor are the target, focusing indicator and min. pupil marker in the center, auto-tracking ON mark, and auto-shot ON mark in the upper center, cylinder mode on the upper right, and measurement count on the lower left. Min. pupil marker Focusing indicator Target When the power is turned on, the main body makes small right/left movements in order to determine the initial setting position for autotracking. This does not mean that the device has been broken. NOTE If <PD ERR> is shown on the left side of the TV monitor, the device may not recognize the left eye or right eye (measurement may not be performed binocularly), and also the PD (pupillary distance) may not be measured. Check the PD window. If the PD window is covered by anything, remove it. If covered by dust, wipe lightly with a swab with a little alcohol to clean it. If <PD ERR> is still shown on the monitor even after performing the corrections described above, install the device in a low light interference environment since the error may have occurred due to light interference. PD window NOTE Err will appear on the display panel if the power is turned on with no printer paper set. To correct the condition, turn on the power switch again after setting the printer paper.

30 Open the auxiliary button cover and set measurement conditions. The cover can be opened by sliding it to the left. a. : See 6. VARIOUS SETTINGS for details of setting parameters. b. : Set the cylinder mode, indication of cylinder reading direction. CYL +... Indicates cylindrical power by a + reading. CYL... Indicates cylindrical power by a reading. CYL ±... Indicates the cylindrical power by a + reading when the refractive error is positive (MIX) for any meridian. Indicates the cylindrical power by a reading in other cases. * The cylinder mode can be changed even after measurement. * Data will be printed out with the mode status at the time of printing. * When the cylinder mode is set to CYL+, the AXIS value of KM measurement indicates the angle of the steepest meridian. In other cases (CYL, CYL±), the AXIS value indicates the angle of the flattest meridian.

31 Press to select the measurement mode. The mode changes in the order of R/K R K R/K.... R/K mode... AR/KM measurement in succession R mode... AR measurement K mode... KM measurement 4. If you are AR-measuring an IOL-implanted eye or an eye with a contact lens, turn on the IOL mode by pressing. The IOL ON mark will appear on the top left of the TV monitor. NOTE When an IOL-implanted eye or an eye with a contact lens is measured, the IOL mode must be turned on. If such eyes are measured without turning on the IOL mode, an error message may appear and measurement may not be completed. IOL ON mark The IOL mode will automatically turn off by sliding the main body or after printout. The IOL mode will automatically turn on when a measurement error has occurred three times in a row. (Auto IOL *2 ) 5. Prepare the patient. 1) Clean the forehead rest and chinrest with clean gauze. If a stack of chinrest paper is fixed to the chinrest, remove one sheet of paper. 2) Instruct the patient to take off his/her glasses or contact lenses and have a seat. *2 <Auto IOL> See 8.1 Setting Parameters for details of setting parameters.

32 4-5 3) Instruct the patient to place his/her chin on the chinrest and forehead on the forehead rest. Eye level marker Chinrest knob 4) Adjust the height of the chinrest by turning the chinrest knob until the center of the patient s eye aligns with the eye level marker. NOTE To relax the patient, explain as follows before measurement. This device measures your eye with an infrared ray to find which kind of lens fits you. The infrared ray does no harm to your eyes.

33 AR (refractive error), KM (corneal curvature radius) Measurements When both auto-tracking and auto-shot are ON Alignment and focusing are automatically performed and measurement starts when in the optimum position. When the auto-tracking function is ON, auto-focusing is also performed. 1. Make sure that (auto-shot ON mark) and (auto-tracking ON mark) are shown on the upper part of the TV monitor. When they are not shown, press to turn on the auto-tracking and auto-shot functions. 2. Perform rough alignment. 1) Instruct the patient to: Look through the measuring window. As you will see a picture of a balloon, watch the center of it without straining. 2) Manipulate the joystick to place the patient s eye onto the TV monitor. By moving the joystick laterally, the main body moves right, left, back and forth. By turning the upper part of the joystick, the main body moves up and down. Align the eye position to the measuring point with right, left, up and down movements. Adjust the focus with back and forth movements. NOTE If the mire ring is not in the center of the pupil and the min. pupil marker is on the iris, turn off the auto-tracking function and bring the min. pupil mark into the center of the pupil to perform measurement, ignoring the mire ring. Auto-tracking or auto-shot may not work on keratoconus or postoperative cornea. In such a case, turn off the auto-tracking and auto-shot functions. See When both auto-tracking and auto-shot are OFF (p. 4-14).

34 Bring the mire ring close to the target so that the device starts alignment automatically. The auto-tracking function does not work unless the mire ring is at around the center of the measurement field. If the ring is too far off the center, manipulate the joystick to move it in. When the position of the mire ring gets out of the working range of auto-tracking, <LIMIT> appears on the left. In such a case, either manipulate the joystick in the direction of the arrows or pull the joystick forward once and perform alignment again. : Turn the grip of the joystick clockwise. : Turn the grip of the joystick counterclockwise. : Tilt the joystick slightly to the right. : Tilt the joystick slightly to the left. : Push the joystick backward. : Pull the joystick forward. Move the joystick back and forth until the focusing indicator shows the optimum state. Too close to the patient s eye Pull the joystick forward to move the main body away from the patient s eye. Optimum state Push the joystick backward to move the main body toward the patient s eye. Too far from the patient s eye NOTE Measurement starts automatically when the device is properly aligned and in focus. The device may not perform correct measurement when the eyelashes are within the min. pupil marker. In such cases, instruct the patient to open his/her eye wider. If the patient cannot open wider, lift the patient s eyelid, paying attention not to press against the eyeball.

35 4. Measurement starts automatically when the device is properly aligned and in focus. NOTE Instruct the patient not to blink during measurement. The operator can start measurement by pressing the start button. Press the start button to start measurement when measurement has difficulty starting for patients who blink often. 4-8 When an error or erroneous data *3 appears, the cause may be one of those described below. If those signs appear again after repeating measurement, check the following: a. Patient blinked during measurement. b. The eyelid or eyelashes are within the min. pupil marker. c. The patient s pupil is smaller than the min. pupil marker. (Have the patient sit in a dark room for a while and wait until the pupil diameter becomes large enough for measurement.) d. Retinal reflection is extremely low due to an optical condition such as a cataract. e. There is some unusual reflection on the cornea during measurement. (In this case, measurement may not be performed unless the IOL mode ( ) is on.) f. There is extreme distortion of the cornea. A. When the measurement mode is set to <<R/K>>: A short beep is heard. KM measurement starts. The measurement count will be shown on the TV monitor. When the median values are obtained and then KM measurement is completed, the latest values of the KM-measured data will be shown on the TV monitor. A short beep is heard again. The patient s view is fogged. *3 <Erroneous data> Data in which the confidence index of AR measurement is E. See 8.1 Setting Parameters.

36 4-9 AR measurement starts. A long beep will be heard and the measurement count will be shown on the TV monitor. When the median values are obtained, measurement will be completed. <FINISH> will appear on the left of the TV monitor. The latest values are always shown on the display panel. * When the Compare SW parameter is set to Auto, the screen will change to the View Comparison function screen after measurement. NOTE The AI mode* 4 is automatically activated regardless of its parameter setting and measurement starts in the High-speed mode* 5 without pressing the start button. If Error Data of the parameter is set to YES and there are no variations in the three measurements, measurement will be completed. If there is erroneous data (confidence coefficient=e) in the measurements, the median value will not be obtained. To continue AR measurement, pressing the start button clears <FINISH> and restarts auto-tracking and measurement (except when the Compare SW parameter or Print parameter is set to Auto ). The device can store up to 10 measurements each for the right and left eyes. If measurements exceed 10, the oldest data will be cleared in order. Go on to step 5 (p. 4-11). *4 <AI mode> This is a mode in which AR/KM measurement is completed as soon as the median values are obtained. *5 <High-speed mode> This mode allows continuous AR measurement with the fogging maintained from the second measurement. See 8.1 Setting Parameters for details of setting parameters.

37 4-10 B. When the measurement mode is set to <<R>>: A short beep is heard. The patient s view is fogged. AR measurement starts. A long beep will be heard and the measurement count will be shown on the TV monitor. When the median values are obtained, measurement will be completed. <FINISH> will appear on the left of the TV monitor. The latest values are always shown on the display panel. * When the Compare SW parameter is set to Auto, the screen will change to the View Comparison function screen after measurement. NOTE To continue AR measurement, pressing the start button clears <FINISH> and restarts auto-tracking and measurement (except when the Compare SW parameter or Print parameter is set to Auto ). The device can store up to 10 measurements each for the right and left eyes. If measurements exceed 10, the oldest data will be cleared in order. Go on to step 5 (p. 4-11).

38 4-11 C. When the measurement mode is set to <<K>>: A short beep is heard. The patient s view is fogged. KM measurement starts. The measurement count will be shown on the TV monitor. When the median values are obtained, KM measurement will be completed. The latest values of KM-measured data will be shown on the TV monitor. Go on to step 7 (p. 4-13). 5. If necessary, change the patient s viewing condition using the View Comparison function (only when AR measurement has been performed). The View Comparison function allows the patient to compare the current viewing condition (unaided eye or corrected with glasses that the patient uses) and the viewing condition corrected according to AR measurement. By changing the distance to the chart, the patient can also check the viewing condition for near vision. Step 5 can be performed after both eyes are measured. 1) Press to set the viewing condition corrected according to AR measurement. The monitor will show the View Comparison function screen. AR flashes, which indicates the viewing condition corrected according to AR measurement. When the Compare SW parameter is set to Auto, the monitor will show the View Comparison function screen automatically as soon as the median values are obtained. Flashing indicates the current viewing condition. flashes: View without correction (unaided eye) LM flashes: View corrected with glasses that the patient uses AR flashes: View corrected according to AR measurement

39 4-12 2) Press again to set the viewing condition without correction (unaided eye). flashes, which indicates the viewing condition without correction. If data of the patient s glasses has been transferred from a NIDEK lens meter, LM will flash instead of and the patient can experience the viewing condition corrected with his/her glasses. The optional interface cable is required for data transfer. 3) Change the current viewing condition (unaided eye or corrected with glasses that the patient uses) and the viewing condition corrected according to AR measurement by pressing to allow the patient to recognize the variation between them. NOTE The dioptric power that the patient can experience during the View Comparison function includes only spherical component, not cylindrical component. Therefore, spherical equivalent (SE value) Sample of spherical equivalent or highest power (spherical power and cylindrical power) is used instead of actual AR-measured data. The dioptric power to be used is shown on the display panel. Sample of highest power Whether to use spherical equivalent or highest power can be selected by the Compare (AR) parameter. Spherical equivalent is used for the viewing condition with data of the patient s glasses transferred from a lensmeter. The View Comparison function must be performed with the target aligned in every direction and in focus, as well as in measurement. When the target is misaligned, perform alignment and focusing again, following step 3. If the patient s eye is hyperopic, the view does not change as much compared with a myopic eye. This is because the patient can see the chart with accommodation even with the unaided eye ( flashing).

40 If necessary, change the patient s viewing condition for near vision. 1) Set the condition that AR flashes. 2) Press. The working distance to the chart will change from the normal distance (5 m- equivalent) to 35 cm-equivalent* 6. 35CM will appear on the left of the TV monitor. The patient can experience the viewing condition corrected according to AR measurement for near vision. Pressing again will return the working distance to the normal distance (5 m-equivalent). Pressing with (or LM ) flashing allows the patient to experience the viewing condition without correction (unaided eye). 3) Pressing the start button with 35CM shown adds the addition power of 1.75D* 7. ADD1.75D will appear on the left side of the TV monitor. The patient can know whether the addition power needs to be added with bifocal lenses or progressive lenses. Pressing the start button again cancels the addition power. If the chart distance returns to the normal distance (5 m-equivalent) by pressing, the addition power will be cleared. If the viewing condition is changed between AR measurement and the unaided eye by pressing, the addition power will be cleared. 7. Measure the other eye in the same manner. 8. Press. See 5.1 Printing Measured Data (p. 5-1). Measured data will be printed out and the View Comparison function screen will return to the normal measurement screen. *6 The near working distance of the chart can be set between 35 and 70 cm (5 cm increments) or 14 and 28 inches (2 inch increments) using the parameter. *7 The addition power can be selected from the parameter settings of 1.5D, 1.75D, and 2.0D.

41 When both auto-tracking and auto-shot are OFF 1. Make sure that (auto-shot ON mark) and (auto-tracking ON mark) are not shown on the upper part of the TV monitor. When they are shown, press to turn off the auto-tracking and auto-shot functions. When the auto-tracking function is off, auto-focusing is not also performed. 2. Perform rough alignment. 1) Instruct the patient to: Look through the measuring window. As you will see a picture of a balloon, watch the center of it without straining. 2) Manipulate the joystick to place the patient s eye on the TV monitor. By moving the joystick laterally, the main body moves right, left, back and forth. By turning the upper part of the joystick, the main body moves up and down. Align the eye position to the measuring point with right, left, up and down movements. Adjust the focus with back and forth movements. NOTE Min. pupil marker Target Mire ring If the mire ring is not in the center of the pupil and the min. pupil marker is on the iris, bring the min. pupil marker into the center of the pupil to perform measurement, ignoring the mire ring. 3) Adjust the focus by moving the joystick back and forth so that the mire ring becomes minimum. NOTE The device may not perform correct measurement when the eyelashes are within the min. pupil marker. In such cases, instruct the patient to open his/her eye wider. If the patient cannot open wider, lift the patient s lid, paying attention not to press against the eyeball. 3. Start measurement. Press the start button.

42 4-15 NOTE Instruct the patient not to blink during measurement. The device can store up to 10 measurements each for the right and left eyes. If measurements exceed 10, the oldest data will be cleared in order. When the AI Mode parameter is set to NO, take about three shots for AR measurement. If the measured data is not stable, take some additional shots. When an error or erroneous data appears, the cause may be one of those described below. If those signs appear again after repeating measurement, check the following: a. Patient blinked during measurement. b. The eyelid or eyelashes are within the min. pupil marker. c. The patient s pupil is smaller than the min. pupil marker. (Have the patient sit in a dark room for a while and wait until the pupil diameter becomes large enough for measurement.) d. Retinal reflection is extremely low due to an optical condition such as a cataract. e. There is some unusual reflection on the cornea during measurement. (In this case, measurement may not be performed unless the IOL mode ( ) is on.) f. There is extreme distortion of the cornea. The measuring procedure is the same as A: When the measurement mode is set to <<R/K>> (p. 4-8), When the measurement mode is set to <<R>> (p. 4-10) and When the measurement mode is set to <<K>> (p. 4-11). However, the timing when AR or KM measurement is completed differs from when both auto-tracking and auto-shot functions are ON. When the AI Mode parameter is set to YES : KM measurement; Measurement is performed until median values are obtained. AR measurement; If there are not any variations in the three measurements, measurement ends. When the AI Mode parameter is set to NO : KM measurement; Three measurements are performed in succession. The number of measurements can be set in the parameter. AR measurement; Serial measurement is performed while the start button is being pressed. 4. If necessary, change the patient s viewing condition. See steps 5-6 of When both auto-tracking and auto-shot are ON (p. 4-11). 5. Measure the other eye in the same manner. 6. Press. See 5.1 Printing Measured Data (p. 5-1). Measured data will be printed out and the View Comparison function screen will return to the normal measurement screen.

43 When auto-tracking is ON and auto-shot is OFF This is a method by which alignment and focusing are automatically performed and the operator determines the measurement timing by pressing the start button. 1. Make sure that (auto-tracking ON mark) is shown and (auto-shot ON mark) is not shown on the upper part of the TV monitor. When the screen is not shown as described above, press to change the setting. (The Tracking SW parameter must be set to T&S/T/M or T/M in advance.) 2. Perform rough alignment and focusing. See steps 2-3 of When both autotracking and auto-shot are ON (p. 4-6). 3. Start measurement. See step 3 of When both auto-tracking and auto-shot are OFF (p. 4-14). 4. If necessary, change the patient s viewing condition. See steps 5-6 of When both auto-tracking and auto-shot are ON (p. 4-11). 5. Measure the other eye in the same manner. 6. Press. See 5.1 Printing Measured Data (p. 5-1). Measured data will be printed out and the View Comparison function screen will return to the normal measurement screen.

44 CS (Corneal Size) Measurement 1. Press. <<CORNEAL SIZE>>, a reference line, and a guide line will appear on the TV monitor. The display panel shows 12.0 which is the default of CS measurement. Reference line Guide line The mode changes as follows for every pressing of. AR/KM CS PS PD 2. Manipulate the joystick to align the reference line with the left side of the patient s cornea. 3. Move the joystick back and forth to focus the mire ring. NOTE If the left side of the cornea is out of alignment, repeat step Move the guide line on the right of the TV monitor with or to align it with the right side of the patient s cornea....the guide line moves to the right. (The display panel indication increases.)...the guide line moves to the left. (The display panel indication decreases.) NOTE The indication changes in increments of 0.5 mm. 5. Press the start button. Measured data will be entered.

45 Measure the other eye in the same manner. NOTE When the AI Mode parameter is set to YES and Print parameter to Auto, CS measurement must be performed before AR/KM measurement in order to print data together with AR/KM results. 7. To go on to AR/KM measurement, press. To go on to PS measurement... Press To go on to PD measurement... Press once. twice.

46 PS (Pupil Size) Measurement 1. Press. (From CS measurement, press once; from AR/ KM measurement, press twice.) <<PUPIL SIZE>>, a reference line, and a guide line will appear on the TV monitor. The display panel shows 5.0 which is the default of PS measurement. Reference line Guide line 2. When the pupil size is measured in a dark place, turn off the chart-illuminating lamp in the measuring window. Press to turn on or off the chart-illuminating lamp. When the chart-illuminating lamp is off, LAMP=OFF will be shown under <<PUPIL SIZE>>. Instruct the patient not to look round and watch ahead without straining. 3. Manipulate the joystick to align the reference line with the left side of the patient s pupil. 4. Move the joystick back and forth to focus the mire ring. NOTE If the left side of the pupil is out of alignment, repeat step Move the guide line on the right of the TV monitor with or to align it with the right side of the patient s pupil.... The guide line moves to the right. (The display panel indication increases.)... The guide line moves to the left. (The display panel indication decreases.) NOTE The indication changes in increments of 0.5 mm.

47 Press the start button. Measured data will be entered. 7. Measure the other eye in the same manner. NOTE When the AI Mode parameter is set to YES and Print parameter to Auto, PS measurement must be performed before AR/KM measurement in order to print data together with AR/KM results. 8. To go on to AR/KM measurement, press. To go on to PD measurement... Press To go on to CS measurement... Press once. twice.

48 PD (Pupillary Distance) Measurement A. Auto-PD measurement (when the Auto-PD parameter is set to YES ) At the moment where measurement of both eyes is completed, PD measurement will have been completed. The near PD will be automatically calculated. PD (Pupillary Distance) NOTE PD value is printed out with measured data. The calculated near PD is not shown on the display panel but printed out with ARmeasured data (only when the Near PD parameter is set to YES ). B. Manual PD measurement (when the Auto-PD parameter is set to NO ) 1. Press. (From CS measurement, press once; from AR/ KM measurement, press twice.) Indications for PD measurement will appear on the display panel. 2. Instruct the patient not to move his/her head and eyes during measurement. 3. After proper alignment of the right eye and left eye, press the start button each time. NOTE If the patient s head is tilted, straighten it before starting measurement. To measure monocular PD at the same time as the binocular PD, press the start button every after proper alignment of the right-eye, center, and the left-eye. To press the start button in the exact center position, have a patient wear the frames with a mark on its center and bring the mark in focus. It is recommendable to use the pupillary distance meter such as the NIDEK PM-600 in order to obtain precise monocular PD.

49 NOTE The r (right), c (center), and l (left) signs on the display panel disappear in turn as the start button is pressed to show that detection of each position has been completed When measurement is completed, measured data will be shown on the display panel.

50 Measuring Sagittal Radius 1. Set the Sagittal parameter to YES. See 6.1 Setting Parameters for the procedure. NOTE If the Print parameter has been set to Auto, it must be set back to Manu.. 2. On condition that KM measurement has been made, press. The measurement mode will change to the sagittal radius measurement mode: The indications of L (Left), R (Right), U (Up), and D (Down) will appear and L will flash to show the position of the illuminated fixation light that the patient will look at. NOTE The median KM values or the latest KM values will be shown on the TV monitor. To quit sagittal radius measurement, press. 3. Instruct the patient to look at the red light on the left side and not to move his/her head. 4. Manipulate the joystick to place the mire ring concentric with the target. 5. Move the joystick back and forth to focus the mire ring until it becomes its thinnest.

51 Press the start button. The sagittal radius of the right part of the cornea will be measured. L changes to *, then R starts flashing. NOTE If measurement is erroneous, L changes to E (Error) and then NEXT appears. In such a case, repeat measurement by pressing the start button. If E remains after repeating measurement, press to proceed to the R side. 7. Instruct the patient to look at the red light on the right hand side and repeat steps 4-6 for the sagittal radius of the left side of the eye. 8. Perform measurement of the D (Down) and U (Up) sides in the same manner. When all four measurements for a single eye are completed, an eccentricity value (E=) will appear and the mode will return to the R/K mode. NOTE Median values of each side (L, R, U and D) are individually obtained by the serial measurement, and the eccentricity data will be obtained by calculation on the basis of the median values for the 4 sides and KM measurement (either the median values or latest values). When the Sagit Axis parameter is set to AXIS, these values will be converted for the angle of the steepest meridian which has been obtained by KM measurement. Concerning the side at which E is indicated, the value of the opposite side on the same meridian will be used for the calculation of eccentricity. If the eccentricity is indicated as E = Err, press to repeat measurement. Repeating measurement, however, clears the former data.

52 Repeat the same procedure for the right eye. It is possible to start binocular sagittal radius measurement after KM measurement of both eyes have been completed. 10. Press to print sagittal radius measurement. NOTE If KM measurement is performed once again without pressing after sagittal radius measurement, the eccentricity data will be recalculated according to the new KM median value, which is based on the stored former data and the newly measured data. When measuring an additional patient, be sure to press the print button beforehand to print and clear data. * The following are sample printouts for the left eye and explanations of each item of data. < Sample printout 1 > * This is the printout for when the Sagit Print parameter is set to Short.

53 4-26 < Sample printout 2 > * This is the printout for when Sagit Print parameter is set to All. < SAGITTAL > = Sagittal radius of each side SUP. = Superior side INF. = Inferior side TEM. = Temporal side NAS. = Nasal side A = Axis of the steepest meridian (of KM measurement) (F = Fixation Angle) S = Sagittal data obtained by adding the dro value to or subtracting it from the sagittal radius values e = Eccentricity values of each sagittal radius eh = Eccentricity on the horizontal meridian ev = Eccentricity on the vertical meridian E = Total Eccentricity ASTc = Corneal cylinder at the center ASTp = Corneal cylinder at the periphery Rh = Average of corneal curvature on the horizontal meridian Rv = Average of corneal curvature on the vertical meridian Ro = Average of corneal curvature at the center dro = Difference of corneal curvature between R1 and R2 dast = Difference of corneal cylinder between the center and the periphery

54 5 PRINTOUT 5.1 Printing Measured Data Measured data will be printed out by pressing NOTE after measurement. When the Print parameter is set to Auto, printing will start automatically as soon as both eyes are measured (FINISH). Do not touch the printer paper while measured data is printed out. A loss of text and lightly printed text may result. The memory indicator is illuminated while measured data is being stored in the memory. As long as the indicator is illuminated, data can be printed any number of times. After printing, the existing data will automatically be cleared when the next measurement has begun. If the Print & CLR parameter is set to YES, data will automatically be cleared right after printing. When the memory indicator is illuminated, holding down for approximately 2 seconds clears the existing data completely. When the memory indicator is not illuminated, serves to feed the paper. <Sample Printout 1> Memory indicator NOTE This sample shows the printout performed on the condition that the parameters related to printout have not been changed since shipment (factory-settings).

55 5-2 < Sample Printout 2 > Description of printed contents Patient number Space for name and sex Date and time of measurement Vertex distance *1 Near working distance *2 AR measurement, Confidence index *3 S = Spherical power, C = Cylindrical power, A = Cylinder axis AR median values *4 SE value *5 Eyeprint *6 Trial lens data *7 CL conversion values *8 KM measurement R1 = Flattest meridian, R2 = Steepest meridian AVE = Average of R1 and R2 CYL = Corneal cylindrical power deg = Corneal cylinder axis KM median values* 9 CS measurement, PS measurement (ON or OFF of the lamp during PS measurement) Measurable range over error *10 Pupillary distance: Distance PD, (Monocular PD), Near PD* 11 Comment *12 NOTE Whether or not to include the data with in the above printout Sample Printout 2 can be set by the parameters No. 24 to 37.

56 5-3 *1 < Vertex distance > The distance between the corneal vertex to the posterior surface of a spectacle lens. *2 < Near working distance > Used for near PD calculation. Changeable in the 35 to 70 cm range by the corresponding parameter. *3 < Confidence index > One of six steps (9, 8, 7, 6, 5, or E) is printed out. E stands for erroneous data. For information, when the IOL (*) Mark parameter is set to YES and AR measurement is performed with on, measured data on printout will be marked with * just before the confidence index. *4 < AR median values > Printed out when three or more AR measurements (except for errors) are in the memory. *5 < SE (Spherical Equivalent) value > Calculated for the median values (or the latest values when the median values have not been obtained) and CL conversion value. *6 < Eyeprint > Tells graphically the patient s refractive status based on the median value. The eyeprint has 8 patterns. Emmetropia Astigmatism Simple myopic astigmatism Myopia Myopic astigmatism Simple hyperopic astigmatism Hyperopia Hyperopic astigmatism

57 5-4 *7 < Trial lens data > Based on the AR median values, the cylinder reading direction is automatically converted so that a spherical trial lens will have lower power as reference data. *8 < CL conversion values > The AR median values are converted into CL values, letting the vertex distance (VD) be 0 mm. *9 < KM median values > Printed out when three or more KM measurements (except for errors) are in the memory. *10 < Measurable range over error > Err +o... The spherical power is over the measurable limit of the + side. Err o... The spherical power is over the measurable limit of the side. Err co... The cylindrical power is over the measurable limit. When the Error Code parameter is set to YES, the error code will be printed out as soon as an error occurs. *11 < Near PD > PD for a near working distance of 35 cm (factory-setting). Use it for prescriptions of reading glasses or bifocals. *12 < Comment > It is possible to enter desired letters or symbols on the printout. For the procedure of entering comments, see 8.3 Entering Comments. 5.2 Eyeprint Aside from normal printouts, serves to print the eyeprint and PD value only based on the median values or latest values. The eyeprint will be printed out regardless of the parameter settings. It will help you to explain to the patient the refractive condition of his or her eyes. The Eyeprint has 8 patterns, the same as those on the normal printout described in 5.1 Printing Measured Data.

58 6 DATA TRANSFER USING EYE CARE CARD SYSTEM Data transfer via the Eye Care card using the optional Eye Care card system EyeCa-RW is explained. The Eye Care card system should be connected to the interface connector for output ( ) provided at the bottom of the device. As for the DIP switch settings, only set SW3 of the DIP switchpack of the Eye Care card system located at the bottom to the ON position. 6.1 Writing Measured Data to the Eye Care Card The procedures for writing AR-(objectively-)measured data to the Eye Care card using the Eye Care card system EyeCa-RW that is connected to the ARK-730A is explained. (If KM measurement has been performed, KM-measured data will also be written.) With the following procedures, objectively-measured data is transferred to an AUTO OPTOMETRY SYSTEM via the Eye Care card. In the case of AUTO OPTOMETRY SYSTEM COS-550 Objectively measured data EyeCa-RW Eye Care card EyeCa-RW Auto Ref/Keratometer ARK-730A There are two methods of writing objectively-measured data to the Eye Care card: <When it is necessary to print the data> 1. Insert the Eye Care card into the ARK-730A on the condition that no measured data is in the memory of the device. The EyeCa-RW will emit a short beep and the access indicator will illuminate in green. If no measured data is in the memory of the ARK-730A, the memory indicator of the ARK- 730A is off. Access indicator 2. Perform measurement. 3. Press. The measured data will be printed out. The access indicator will illuminate in orange and the data will be written to the Eye Care card. After the data has been written successfully, the EyeCa-RW will emit a short beep and the access indicator will flash in green. 4. When the orange access indicator changes to the green flashing one, remove the Eye Care card.

59 6-2 <When it is unnecessary to print the data> Set the Print parameter to Manu. or NO in advance. 1. After measurement, insert the Eye Care card. The EyeCa-RW will emit a short beep and the access indicator will illuminate in green. Then the green access indicator will change to the orange one, and the data will be written to the Eye Care card. After the data has been written successfully, the EyeCa-RW will emit a short beep and the access indicator will flash in green. 2. When the orange access indicator changes to the green flashing one, remove the Eye Care card. The data in the memory of the ARK-730A will be cleared when the next measurement has begun. CAUTION Never remove an Eye Care card while it is being accessed. While the card is being accessed, the access indicator will illuminate in orange. The access indicator flashing in orange indicates an error occurrence. In this case, the operator is only allowed to remove the card. When trying to remove the card while it is being accessed, data will not be written successfully and the Eye Care card may be irreparably damaged.

60 Importing LM Data to be Used for the View Comparison Function Import LM data (data of glasses that the patient uses) to the ARK-730A by inserting the Eye Care card with the LM data written to into the Eye Care card system EyeCa-RW that is connected to the ARK-730A. The imported data is then used for allowing the patient to experience the viewing condition with his or her glasses instead of unaided eyes using the View Comparison function. * Set the EyeCareC (LM) parameter to YES in advance. In the case of AUTO OPTOMETRY SYSTEM COS-550 EyeCa-RW Objectively measured data LM data Eye Care card [Operation (B)] LM data [Operation (A)] Eye Care card EyeCa-RW EyeCa-RW Auto Ref/Keratometer Lensmeter ARK-730A [Operation (A)] Insert the Eye Care card. The LM data will automatically be imported to the ARK-730A. [Operation (B)] See 6.1 Writing Measured Data to the Eye Care Card. As for the procedure of writing data measured by the ARK-730A to the Eye Care card, see 6.1 Writing Measured Data to the Eye Care Card. As for importing of LM data, it will automatically start as soon as the Eye Care card with LM data written by the EyeCa-RW that is connected to the lensmeter is inserted into the EyeCa-RW that is connected to the ARK-730A. In this case, the LM data in the Eye Care card will not be erased. NOTE The LM data on the Eye Care card will automatically be erased if one of the following conditions is met: If LM data is transferred to an AUTO OPTOMETRY SYSTEM. If new LM data is written. (The new data will be written over the existing data on the card.) Therefore, if patient A s LM data is not transferred to the AUTO OPTOMETRY SYSTEM and the next patient B receives AR measurement only, there are possibilities that one Eye Care card holds both LM data of patient A and objectively measured data of patient B. In such cases, to avoid confusion, erase the data on the Eye Care card before writing the objectively measured data of patient B. See 6.3 Erasing Data on the Eye Care Card.

61 NOTE 6-4 It is possible to import LM data by connecting the ARK-730A and a NIDEK Lensmeter with the optional interface cable (see the * 2 footnote on page 3-8). In this case, when the print button (or DATA button) of the lensmeter is pressed just after measurement using the lensmeter, the measured LM data will be imported to the ARK-730A. 6.3 Erasing Data on the Eye Care Card All the data on the Eye Care card is erased. 1. Hold down the clear switch for about 1 second. The EyeCa-RW will emit a short beep and the access indicator will illuminate in red. Clear switch 2. Insert the Eye Care card. The access indicator will illuminate in orange and all the data on the Eye Care card will be erased. If the data has been erased, the EyeCa-RW will emit a longer beep and the access indicator will flash in green.

62 7 ENTERING PATIENT ID USING BARCODE SCANNER It is possible to read a patient ID by scanning a barcode using the optional barcode scanner. 7.1 Connecting the Barcode Scanner The procedure for connecting the optional barcode scanner is explained. CAUTION Connections must be made on a stable, level place with enough space. If the device falls, malfunction or injury may result. Connections must be made after turning off the ARK-730A. 1. Turn off the power switch and disconnect the power cord from the wall outlet. 2. Lock the main body to the base unit with the locking knob and lay the ARK-730A down gently. 3. Connect the cable of the barcode scanner to the interface connector for input ( ) located at the bottom of the ARK-730A (see page 3-7). 4. Stand up the ARK-730A, and loosen the locking knob to release the main body. 5. Connect the power cord to the wall outlet and turn on the power switch. 6. Set the No. 56: IN Port Sel. parameter to Barcode. See 8.1 Setting Parameters (p. 8-1). NOTE The power to the barcode scanner is supplied via the cable connected to the interface connector of the ARK-730A.

63 Reading a Patient ID A patient ID is read from a barcode. The read patient ID will be used in the NIDEK ADVANCED VISION INFORMATION SYSTEM NAVIS. The read patient ID as well as measured data will be included in a printout produced by the ARK-730A (see page 5-2). NOTE Although a patient ID can be read before and after measurement, it is advisable to read it before printing measured data. 1. Let the scanner window scan the barcode. 2. Press the trigger button. The scanner window will flash in red and the barcode will be read. After the barcode has been read successfully, the confirmation LED will illuminate and the scanner will emit a short beep. At the same time, when the barcode has been read successfully, the ARK-730A will show ID on the TV monitor. Scanner window Trigger button Confirmation LED NOTE When the patient ID is read using the barcode and then the read data is printed, it will be automatically erased from the memory regardless of the setting of the Print&CRL parameter. When the measured data that has been printed is displayed, it will be automatically erased after the patient ID is read.

64 8 VARIOUS SETTINGS 8.1 Setting Parameters The ARK-730A is equipped with a function to change parameters of various device conditions according to the operator s needs. The method of changing and confirming each parameter setting is described as follows. 1. Press. The TV monitor shows PARAMETER SET << 1/6 >>, and the display panel shows the setting and the parameter number. Setting Parameter No. 2. Establish the parameter setting mode which contains the desired parameter, referring to the parameter tables on pages 8-4 to 8-9. For each pressing of, the setting mode changes in the order shown below. Parameter setting mode 1 (Parameter No. 1 to 10) Mode 2 (Parameter No. 11 to 17) Mode 3 (Parameter No. 21 to 30) Mode 4 (Parameter No. 31 to 38) Mode 5 (Parameter No. 41 to 48) Mode 6 (Parameter No. 51 to 58) Date & Time setting mode Parameter setting mode 1....

65 In the selected mode, press. The parameter settings in each mode will be printed as follows. No. Parameter name Setting

66 Make the desired parameter number appear on the display panel. For each pressing of the start button, the parameter number increases. NOTE Pressing the start button when the last number of the selected mode is shown makes the first parameter number of that mode appear again. 5. Change the setting by pressing or. NOTE Refer to the parameter tables on the following page for the setting contents. An underlined setting option indicates the factory setting. (Factory-settings may vary with destinations.) 6. To finish setting Press. To activate the date and time setting mode Press. To change another parameter setting Go back to step 2. NOTE The parameter settings will be maintained in the memory due to an internal battery *1 even though the power switch is turned off. *1 The battery is rechargeable. When you are operating the device for the first time after unpacking or when the device has not been operated for a long time (about one month or longer), the clock may reset to zero, and the system parameters and comment settings may return to their factory settings. In such a case, turn on the device and leave it ON to recharge the battery. The battery needs 24 hours for a full charge. If you are using the device 8 hours a day, you will have to keep the device on for three days before the battery is fully charged. Once the battery is fully charged, the device operates normally for daily use. A rechargeable lithium battery is used in the device. When disposing of the battery-mounted circuit board, follow local governing ordinances and recycling plans regarding disposal or recycling of lithium batteries.

67 Parameter Tables < Setting Mode 1 > No. Parameter name Setting option 1 Step 0.01D / 0.12D /0.25D 2 Vertex D. 0 mm / 10.5 mm /12 mm mm / 15 mm / 16.5 mm 3 Axis Step 1º / 5º 4 Meas. Mode Con. / Nor. 5 AI Mode YES / NO 6 Tracking SW S&T/M / S&T/T/M / T/M 7 Compare SW Auto / Manu. / NO 8 Compare (AR) SE / SPH 9 ADD. SW YES / NO 10 ADD. Sel. 1.50D / 1.75D / 2.00D 8-4 [No. 1] The indication step of SPH and CYL data for AR measurement. [No. 2] The distance between the corneal vertex to the posterior surface of spectacle lenses when the patient wears them. * mm for the default of devices destined for NIDEK INCORPORATED. [No. 3] The indication step of AXIS data for AR measurement. [No. 4] The way of fogging for AR serial measurement. Con. (High-speed mode): The fogging is maintained throughout the serial measurement. This mode is useful for children who cannot fixate their eyes very long. Nor.: Holding the start button keeps fogging for each measurement. This mode is useful for patients who accommodate their eyes easily. [No. 5] Selection of whether or not to use the AI mode. When this parameter is set to YES, measurement will be automataically completed when the median values are obtained. [No. 6] Selction of how to switch the auto-tracking and auto-shot functions to ON or OFF when is pressed. S&T / M: Every time is pressed, both the auto-tracking and auto-shot functions are switched bewteen ON and OFF. S&T/ T/ M: Every time is pressed, these functions are switched as: Both the autotracking and auto-shot functions are turned on. Only the auto-tracking function is turned on. Both the auto-tracking and auto-shot functions are turned off. T/ M: Every time is pressed, these functions are switched as: Only the auto-tracking function is turned on. Both the auto-tracking and auto-shot functions are turned off. With this setting, the auto-shot function is disabled. [No. 7] Selection of how to enter the View Comparison function screen. Auto: The View Comparison function screen will automatically be shown when one eye has been measured. Manu.:The View Comparison function screen will be shown when is pressed. NO: The View Comparison function screen is not shown.

68 8-5 [No. 8] Selection of the SPH value (spherical power) to be used for the viewing condition of AR measurement during the View Comparison function. SE: The spherical power of the SE value (Spherical Equivalent) is used. SPH: The highest power (spherical power + cylindrical power) is used. [No. 9] Selection of whether or not to add addition power by pressing the start button during the View Comparison function for near vision. [No. 10] Selection of the addition power to be added during the View Comparison function for near vision. < Setting Mode 2 > No. Parameter name Setting option 11 KM Unit mm / D 12 KM Display R1, R2 / AVE, CYL 13 Ref. Index / / KM Continue 1 to 10 (3) 15 Sagittal YES / NO 16 Sagit Axis Axis / FIX 17 Sagit Print All / Short [No. 11] Selection of whether or not to indicate the corneal curvature with radius (mm) or refractive power (D). * D for the default of devices destined for NIDEK INCORPORATED. [No. 12] Selects the KM measurement indication between R1 (flattest meridian) & R2 (steepest meridian), and AVE (average of R1 and R2) & CYL (corneal cylinder axis). [No. 13] Selection of the corneal refractive index. [No. 14] Setting of the number of serial measurements for KM measurement in the R/K or K mode. [No. 15] Selection of whether or not to measure sagittal radius after KM measurement in the R/K or R mode. [No. 16] Selection of whether or not to convert the sagittal radius measurement for the axis of the steepest meridian which has been obtained by KM measurement. To convert data, choose AXIS. [No. 17] Selection of the print format of the sagittal radius measurement. All: All data is printed out (see page 4-26). Short: Only the sagittal radius values and the total eccentricity are printed out (see page 4-25).

69 8-6 < Setting Mode 3 > No. Parameter name Setting option 21 Print Manu. / Auto / NO 22 Econo. Print YES / NO 23 Print & CLR YES / NO 24 Patient No. YES / NO 25 Patient No to Name Print YES / NO 27 Date Format Y.M.D / M.D.Y / D.M.Y / NO 28 Eye Print YES / NO 29 AR Print All / Short 30 KM Print All / Short / All (KM) [No. 21] Selection of how to start printing, or not to print. Manu.: Data is printed out by pressing. Auto: Data is printed out automatically after both eyes have been measured. NO: Data is printed out. [No. 22] Selection of whether or not to use the economical print function. When this parameter is set to YES, the data will be printed with narrow line-spacing so that the printer paper can be saved. [No. 23] Selection of whether or not to erase measured data in the memory right after printing. When this parameter is set to NO, the measured data will be erased when the next measurement is performed after printing. [No. 24] Selection of whether or not to print the patient number. [No. 25] Setting of the patient number to be printed out. The patient number increases. The patient number decreases. ( works as a reset button. If the button is pressed at first, the value will reset to 0001.) [No. 26] Selection of whether or not to provide spaces for writing the patient s name and sex on the printout. [No. 27] The format of the date on the printout. (e.g.: In the case of 4 o clock PM on December 20, 2002) Y.M.D = Year, Month, Day (e.g.: :00 PM) M.D.Y = Month, Day, Year (e.g.: DEC/20/2002 4:00 PM) D.M.Y = Day, Month, Year (e.g.: 20/DEC/2002 4:00 PM) NO = Date and time are not printed. [No. 28] Selection of whether or not to print the eyeprint. [No. 29] The print format of AR measurement. All: All data and median values are printed out. Short: Only the median values are printed out. [No. 30] The print format of KM measurement. All: All data and median values are printed out. Short: Only the median values are printed out. All (KM):When the K mode is selected for the measurement mode, all data and median values are printed out. When another mode is selected, only the median values are printed out.

70 8-7 < Setting Mode 4 > No. Parameter name Setting option 31 SE Print YES / NO 32 TL Print YES / NO 33 CL Print YES / NO 34 Conf. Index YES / NO 35 IOL(*)Mark YES / NO 36 Near PD YES / NO 37 Error Print YES / NO 38 ID Print YES / NO [No. 31] Selection of whether or not to print SE values for the median values (or the latest values when the median values have not been obtained). [No. 32] Selection of whether or not to print trial lens data which is based on the median values. [No. 33] Selection of whether or not to print CL conversion values which are based on the median values, and SE values of the CL conversion values. [No. 34] Selection of whether or not to print the confidence index. [No. 35] Selection of whether or not to print * just before the confidence index indicating that the data was measured in the IOL mode. [No. 36] Selection of whether or not to print Near PD data. [No. 37] Selection of whether or not to print error occurred during AR measurement. [No. 38] Selection of whether or not to print the patient ID. The patient ID is scanned by the optional barcode scanner.

71 8-8 < Setting Mode 5 > No. Parameter name Setting option 41 Window check YES / NO / DAY 42 Auto IOL YES / NO 43 Auto PD YES / NO 44 Working D. 35 to 70 cm / 14 to 28 inch 45 TV Auto-OFF 5 min / 10 min / 15 min / NO 46 Beep High / Low / NO 47 Error Code YES / NO 48 Error Data YES / NO [No. 41] Selection of whether or not to automatically check the measuring window for soiling (p. 10-6). NO: The measuring window is not checked. YES: The measuring window is checked at every startup. DAY: The measuring window is checked at the first startup of the day. [No. 42] Selection of whether or not to use the auto IOL function. When set to YES, the IOL mode ( ) automatically turns on after three erroneous measurements in a row. [No. 43] Selection of whether or not to measure PD during AR measurement. (Applies only when both eyes are measured.) [No. 44] Setting of the near working distance, which is referred at near PD calculation, between 35 to 70 cm (5 cm increments). After this, there is an option for the indication in inches between 14 to 28 inches (2 inch increments). The setting is also in effect as the near working distance during the View Comparison function. * 14 inches for the default of devices destined for NIDEK INCORPORATED. [No. 45] Selection of whether or not to use the auto-off function and the time of no operation after which the TV monitor is shut off. Auto-off mode: The TV monitor turns off automatically when there is no operation for more than the set time period and the display panel shows the time. The monitor ON condition is recovered by pressing any button. [No. 46] Selection of the tone of the beeps which is emitted during measurement. [No. 47] Selection of whether or not to display and print error codes occurred during AR measurement. [No. 48] Selection of whether or not to display and print erroneous data obtained during AR measurement. (When this parameter is set to YES, an error will appear once and then the flashing error data will appear on the display.)

72 8-9 < Setting Mode 6 > No. Parameter name Setting option 51 I/F Mode NIDEK / NCP10 52 I/F Format All / Short 53 Baud-Rate 9600 / 4800 / 2400 / Bit Length 7 / 8 55 CR Code YES / NO 56 IN Port Sel. LM / Barcode 57 LM Data Prt. YES / NO 58 EyeCareC (LM) YES / NO [No. 51] Setting of the device to be communicated with. NIDEK: Communication with a NIDEK-brand device (Set this parameter to NIDEK.) [No. 52] The format of data to be sent. Selectable between All, which sends out all the measured data, and Short, which sends out only the restricted data. [No. 53] Selection of baud-rate (bit transmission speed) for communication. [No. 54] The bit number for a single character used for communication. [No. 55] Selection of whether or not to attach a CR (carriage return) code at the end of data to be sent. [No. 56] Selection of the device to be connected to the interface connector. LM: Lensmeter Barcode: Barcoder scanner [No. 57] Selection of whether or not to print the data measured by the lensmeter connected to the interface connector with the printer built into the AR. When this parameter is set to YES, the printout of the data will come out from the printer built into the ARK-730A by pressing the print button of the lensmeter. Use a lensmeter provided with the function for printing data. For details, refer to the Lensmeter Operator s Manual. [No. 58] Selection of whether or not to read LM (lensmeter) data from the optional Eye Care card system connected to the interface connector. The read LM data will be used for the View Comparison function. In addition, when using the old-type IC card Reader/Writer, set this parameter to NO.

73 Setting Date and Time 1. Press. 2. Press six times so that the date and time setting mode is established. The TV monitor shows CLOCK SET while the display panel shows the date with year flashing. The flashing number indicates that the number is changeable. Year Month Day Hour Minute AM/PM 3. Press the start button to select the position that you want to change. The selection order is as follows: Year Month Day Hour Minute Year 4. Press or to change the setting.... The number increases.... The number decreases. 5. Repeat steps 3 and 4 to set date and time. 6. After setting the desired parameters, press to exit the date and time setting mode. Pressing instead of returns the mode to parameter setting mode 1. NOTE The internal clock will continue to work due to an internal battery even though the device is turned off. If the date and time setting becomes incorrect, recharge the battery (see *1 on page 8-3).

74 Entering Comments 1. Turn off the power switch. 2. While holding down, turn on the power switch. The following will be printed out. < Sample Printout > Parameters Parameters for servicing Parameters for servicing Date and time Comment Model name

75 3. Press seven times to establish the mode for entering comments. The TV monitor shows COMMENT SET while the display panel shows the following Character code Line No. Column No. NOTE It is possible to input up to 24 2 characters. Column No. 1 Line No Make the desired column number and the desired line number appear on the display panel. When the start button is pressed, the column number increases. When the start button is pressed after column number 24 is displayed, the line number changes. 5. Press or to change the character code to the desired one.... The character code increases.... The character code decreases. For the character code, refer to the table on the following page.

76 8-13 Character Code Table The following characters (symbols) are available to input. Ten place of character code One place of character code A b 0 SPC P P 1! 1 A Q a Q 2 2 B R b R 3 # 3 C S c S 4 $ 4 D T d T 5 % 5 E U e U 6 & 6 F V f V 7 7 G W g W 8 ( 8 H X h X 9 ) 9 I Y i Y A : J Z j Z B ; K [ k [ C, < L l { D = M ] m } E. > N n F /? O o < Example > N I D E K A R K A 2 If you want to input the letter N in column number 10 of line number 1, display 4E 1-7 on the display panel. 6. Repeat steps 4 and 5 to enter a desired comment. 7. After entering the comment, press to exit the setting mode. Pressing instead of returns the mode to parameter setting mode 1. NOTE The set comment will be kept in the memory due to an internal battery even though the power switch is turned off. If the setting returns to the default, recharge the battery (see *1 on page 8-3).

77 Measuring Hard Contact Lenses 1. Fix the mount for the optional CL holder onto the upper end of the headrest post and fix it with the fixing screw. 2. Fill the concave top of the CL holder with water. 3. Put a contact lens in the water with the surface to be measured facing upward. When measuring the concave surface, place the lens with the concave surface up. When measuring the convex surface, place the lens the other way. NOTE Be careful not to let bubbles get under the lens or water or dust on the lens. 4. Insert the pin of the CL holder into the cavity on the top of the mount and turn the holder with the surface to be measured facing toward the measuring window. 5. Select KM measurement mode and measure the lens in the same manner as usual KM measurement. NOTE When the convex surface of a contact lens is measured, the axis angle can be read directly. When the concave surface is measured, however, the measured axis will be read inversely. Soft contact lenses cannot be measured.

78 9 TROUBLESHOOTING GUIDE In the event that the device does not work correctly, correct the problem according to the following table before contacting NIDEK or your authorized distributor. Symptom The TV monitor and disdplay panel do not turn on. The TV monitor does not turn on (not clear) even though the power is on. The screen disappears suddenly. The screen rolls. * This symptom does not occur in the LCD type monitor. The main body cannot be moved laterally. Printing cannot not be executed. Suggestion The power cord may not be correctly connected. Reconnect it securely. The power switch may not have been turned on. Check the power switch. The fuses may be blown. If so, replace with new ones (p. 10-4). The auto-off function may have been executed. Try to recover the monitor ON condition by pressing any button. The brightness may be darkly adjusted. Open the AUX. button cover and adjust the brightness by turning the brightness control. The auto-off function may have been executed. Try to recover the monitor ON condition by pressing any button. The screen may not be horizontally or vertically locked. Adjust it with the H or V control (p. 3-7). The locking knob may be fixing the main body. Release the main body by turning the locking knob which is beside the joystick. The locking knob may be impeding the main body. Release the main body by turning the locking knob which is beside the joystick. Check the printer paper. If the paper has been used up, set new printer paper (p. 10-1). The "Print" parameter may be set to "NO". Reset the parameter setting.

79 9-2 Symptom The printer does operate, however, printed results cannot be obtained. Suggestion The printer roll may be set with the wrong side up. Set it with the correct side up. The auto-tracking function or auto-shot function may not have been turned on. Press to turn it on. Room illumination may be reflecting on the cornea. Change the location and try measurement again. The auto-tracking function or auto-shot function does not work. Date and time settings go out of order or system parameters and comment setting return to their factory settings. When the power is turned on, the following error appears: Err a, d The error message "Memory failure on RAM, Clock Error" is printed out. "<PD ERR>" appears on the TV monitor. The auto-tracking function or auto-shot function may not work on some eyes such as keratoconus or recently-operated cornea. In such cases, turn off the auto-tracking function and start measurement. The patient who has substantial ocular ataxia or who cannot fixate his or her eyes, the autotracking function may not work. In such cases, turn off the auto-tracking function and start measurement. If the device is installed in the vicinity of a window where the device is exposed to sunshine, light interference may adversely affect these functions. Change the installed position of the device and start measurement again. The internal battery may be dead. Turn the power on and leave it on for 24 hours to recharge the battery. The internal battery may be dead. Turn the power on and leave it on for 24 hours to recharge the battery. Make sure that the PD measuring window is not blocked (p. 4-2).

80 9-3 Symptom Suggestion The patient may have blinked during measurement. Instruct the patient not to blink and try measurement again. The eyelid or eyelashes may obstruct measurement. Instruct the patient to open his or her eye wider. If the patient cannot open wider, lift the patient's lid, paying attention not to press against the eyeball. A measurement error appears. The pupil may be too small for measurement. Have the patient sit in a dark room for a while until the pupil enlarges enough and try measurement again. An IOL-implanted eye or eye with a contact lens may be measured. Turn on and try measurement again. ("IOL" will appear on the upper left of the monitor.) The message "Check measuring window" is printed out on startup. The following error appears on the display panel at power-up: Err 7 The following error appears on the display panel: Err IF The following error appears on the display panel at power-up: Err 1-4, 9, b, c The error message "Memory failure on E2PROM, PC22 Error" is printed out. The data may exceed the measurable limit. Clean the measuring window. See "10.4 Cleaning the Measuring Window". If the measuring window is not dirty, make sure that the measuring window is not blocked on Check t t the printer paper. The paper may be used up or the printer lever may be incorrectly set. Push the lever down (p. 10-1). Check the connection of the interface cable. Contact NIDEK or your authorized distributor. Contact NIDEK or your authorized distributor. * If the problem cannot be solved by following the suggestions above, contact NIDEK or your authorized distributor.

81 10 MAINTENANCE 10.1 Replacing the Printer Paper When a red line appears on the side of the printer paper, it means that the paper is running short. In such a case, stop using the printer and replace the paper with a new one. NOTE Do not run the printer without printer paper. It ruins the printer head. Do not pull the printer paper in the printer forcefully. This may cause malfunction of the printer. Replace the printer paper with the power switch off. 1. Pull the printer cover to open. 2. Raise the lever on the right and turn the gear backward in order to feed the paper out. Lever Gear 3. Take out the used paper and remove the shaft from the roll.

82 Insert the shaft into the new roll of printer paper. 5. Cut the end neatly with scissors and pass the paper through the printer housing as shown in the figure on the right. NOTE If the roll is set in such a way that the paper becomes upside down, it is not possible to print data on the paper. When the paper comes to point, turn the gear forward to feed the paper. Gear 6. Set the printer paper into the printer. NOTE To remove the slack from the paper, turn the gear forward. 7. Push down the lever on the right. Lever 8. Pass the paper through the printer cover. 9. Push the printer cover toward the main body.

83 Setting a Stack of Chinrest Paper 1. Remove the two fixing pins from the chinrest. 2. Take out a proper number of chinrest papers from a pack of the paper. It is impossible to set a whole stack of chinrest paper. Be sure to set a stack with a thickness of 6 mm or less. Pay attention not to scatter the chinrest paper. 3. Insert the fixing pins into the holes in the chinrest paper. Insert the removed pins into both holes of the stack of paper. 4. Set the stack of chinrest paper onto the chinrest. 1) Insert the pins into the holes in the chinrest while holding both fixing pins and stack of paper. 2) Push the pins into the holes of the chinrest with the other hand. Fixing pin Stack of chinrest paper

84 Replacing Fuses If the device does not work even though the power switch is on, the fuses may be burnt out. In such a case, replace them. CAUTION Replace fuses in a stable and open space. If the device falls, it may cause device malfunction or personnel injury. Never use fuses other than specified. This may cause fire. AC 100 V, 120 V: AC V, V: T2A 250 V T1A 250 V 1. Turn off the power and remove the power cord. 2. Lock the main body to the base unit with the locking knob and lay it down gently. 3. Turn the fuse holders counterclockwise as indicated by the arrow with a screwdriver and remove them. 4. Pull out the fuse holders from the base unit.

85 Remove the used fuses from the fuse holders and insert new fuses into the fuse holders. 6. Turn the fuse holders clockwise while pressing them down with the screwdriver and set it into the main body. CAUTION If fuses blow frequently, do not touch the inside of the device but contact NIDEK or your authorized distributor. If you touch the inside of the device, electric shock may result.