2/4/2016. Spectacle Lens Update: Everything you need to know. Impact of Good Vision. Spectacle Lens Update

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Mariah Pierce
6 years ago
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: Everything you need to know Michael C.

Vision Click to edit Master title style Average eyewear lifespan.

.. > over 30,000 miles of driving > viewing 49 or more movies > 2.

1 : Everything you need to know Michael C. Vitale, ABOM, LDO, NCLC Technical Director & Lens Division Liaison The Vision Council Michael Vitale has no financial interests to disclose Impact of Good Vision Click to edit Master title style Average eyewear lifespan... > 28 months Eyewear will be used for... > over 30,000 miles of driving > viewing 49 or more movies > 2.2 weddings / graduations > 26 family events & holidays > 1 in 3 presbyopes will see a grandchild for the 1 st time Click Header to Example edit Master Goes title here style Areas of Performance > Design > Surface > Filter > Substrate 1

$fitting in todays flatter frame front designs Single Vision Lens Design Spherical lenses create peripheral distortion because light is unequally refracted across the lens surface.$

2 Single Vision Lens Design Historically > Spherical Lenses» Corrective Curve Design - Optical Aberrations - Magnification for plus power lenses - Field of view Issues > Steep curves» Difficulties fitting in todays flatter frame front designs Single Vision Lens Design Spherical lenses create peripheral distortion because light is unequally refracted across the lens surface... multiple points of focus... Single Vision Lens Design Historically > Asphericity» Reduces Optical Aberrations - Less magnification for plus power lenses - Less distortion - Increased field of view > Cosmetically Flattens» Allows for flatter, thinner lenses 2

Single Vision Lens Design Aspheric/Atoric lenses use multiple curvatures

single focal point Single Vision Lens Design What s New Now!

take into account;» Pantoscopic Tilt» Face form (Wrap Angle)» Vertex

3 Single Vision Lens Design Aspheric/Atoric lenses use multiple curvatures to reduce peripheral defocus and aberration. single focal point Single Vision Lens Design What s New Now! As Worn or Compensated Single Vision Lenses > The Rx is compensated to take into account;» Pantoscopic Tilt» Face form (Wrap Angle)» Vertex Distance > Increases field of view > Less distortion Products Click to edit Master title style Questions? Comments? 3

PAL Lens Design PALs Should Provide > Natural Reading Posture» greater comfort while reading > Optimized Zone Placement» ease of adaptation > Binocular Width» wider

Shorter progressions provide more natural reading postures... Image courtesy of Essilor of America.

4 PAL Lens Design PALs Should Provide > Natural Reading Posture» greater comfort while reading > Optimized Zone Placement» ease of adaptation > Binocular Width» wider intermediate vision > Sharp Distance Vision» improved contrast at night > Specialized Design» task/wearer specific zone distribution PAL Lens Design Natural Reading Posture Shorter progressions provide more natural reading postures... Image courtesy of Essilor of America...a natural reading posture relies primarily on head movements PAL Lens Design Optimized Zone Placement Distance Rx and ADD power determine optimal zone placement... HYPEROPE MYOPE...true multi-design PALs optimize zones for ametrops, for easier adaptation 4

Binocular Width PAL Lens Design The ability to maintain

of the channel PAL Lens Design Binocular Width Patented

astigmatism... Image courtesy of Essilor .

width PAL Lens Design Sharper Distance Vision New Design

5 Binocular Width PAL Lens Design The ability to maintain fusion is called "binocularity" Image courtesy of Essilor of America...binocularity determines width- not the spherical area of the channel PAL Lens Design Binocular Width Patented Design Technology allows specific alignment of astigmatism... Image courtesy of Essilor of America...this increases binocularity- and therefore intermediate width PAL Lens Design Sharper Distance Vision New Design Technology controls aberrations in the distance zone...control of aberrations provides clinically proven gains in contrast 5

can be designed specifically to a frame type STANDARD DISTRIBUTION SHORT DISTRIBUTION PAL Lens

6 PAL Lens Design Specialized Design Progressions can be designed specifically to a task FAR DISTRIBUTION STANDARD DISTRIBUTION NEAR DISTRIBUTION PAL Lens Design Specialized Design Progressions can be designed specifically to a frame type STANDARD DISTRIBUTION SHORT DISTRIBUTION PAL Lens Design Specialized Design Progressions can be designed specifically to an Rx STANDARD DISTRIBUTION OPTIMIZED ZONES 6

PAL Lens Design Specialized Design Progressions can be designed specifically to a patient characteristic EYE MOVER STANDARD DISTRIBUTION HEAD MOVER Fitting & Dispensing Products > Traditional &

Task Specific > Helps the eye adjust to intermediate-distance objects such as computer screens» A modified lens power provides the consumer with a large field of view» Too many products to

7 PAL Lens Design Specialized Design Progressions can be designed specifically to a patient characteristic EYE MOVER STANDARD DISTRIBUTION HEAD MOVER Fitting & Dispensing Products > Traditional & Freeform» Thanks to the Lab Division of TVC > Freeform» Thanks to Vision Care Product News» Computer Glasses? Task Specific > Helps the eye adjust to intermediate-distance objects such as computer screens» A modified lens power provides the consumer with a large field of view» Too many products to mention, reference the Progressive Lens Identifier > Powerboost single vision lenses for non-presbyopes» Zeiss, Hoya, Essilor, etc. > Over the counter products such as GUNNAR > Custom designed» Double FT/Rd seg» Inverted» Golf 7

Fitting & Dispensing Proper fitting is crucial to the performance of ANY and ALL designs > Proper adjustment of the frame» Faceform» Pantoscopic Tilt» Vertex Distance > Proper placement of the

8 Fitting & Dispensing Proper fitting is crucial to the performance of ANY and ALL designs > Proper adjustment of the frame» Faceform» Pantoscopic Tilt» Vertex Distance > Proper placement of the optics» Monocular PD s» Monocular Fitting Heights An improper fit will compromise the performance of ANY design Fitting increases in importance with design complexity Click to edit Master title style Questions? Comments? Lens Surfaces High Performance Surfaces Provide > Hardcoating Thermal and UV» greater durability > Multi-layer Anti-Reflective Stack» sharper vision» increased night vision» better cosmetics > Hydrophobic & Conductive Layers» easier to clean» greater durability 8

Lens Surfaces Thermally-cured Hardcoat The lifespan of a lens is determined by the durability of the surface

..surfaces are thermally bonded into the substrate Lens Surfaces Multi-Layer AR Stack Surfaces include a

..AR also reduces night-time reflections/glare and provides superior cosmetics Lens Surfaces Hydrophobic &

9 Lens Surfaces Thermally-cured Hardcoat The lifespan of a lens is determined by the durability of the surface Primer Silica-Resin Hardcoat SUBSTRATE...surfaces are thermally bonded into the substrate Lens Surfaces Multi-Layer AR Stack Surfaces include a multi-layer AR for increased transmission Multi-Layer AR SUBSTRATE...AR also reduces night-time reflections/glare and provides superior cosmetics Lens Surfaces Hydrophobic & Conductive Layers An AR incorporating a TCO (transparent conductive oxide) will repel dust and other particles Hydrophobic Layer SUBSTRATE...a hydrophobic layer repels water & oilresulting easier and less frequent cleaning 9

10 Lens Surfaces Hydrophobic & Conductive Layers Hydrophobic durability is a function of coating density... Image courtesy of Essilor of America...higher densities lead to a longer effective hydrophobic lifespan Lens Surfaces Include high-performance surfaces on your lenses > Nearly all patients want:» Increased visual acuity» better night vision» increased durability» ease of cleaning» less noticeable eyewear 60% of all US eyewear consumers choose AR when informed of its benefits Click to edit Master title style Questions? Comments? 10

> UV Filters > Photochromic s» adjustable filtering» UV protection > Polarized» glare reduction» superior contrast» sport & vocational applications» UV protection >

types of UV» UVC < 285nm» UVB 286 320nm» UVA 320 380nm ozone» HEV > 380nm Only 2 materials do not block UV» clear CR-39» clear glass Ultraviolet Filters > On average,

11 > UV Filters > Photochromic s» adjustable filtering» UV protection > Polarized» glare reduction» superior contrast» sport & vocational applications» UV protection > Fixed Tint» neutral & selective filters > Specialized Filters/AR Coatings» Selectively filters blue light and UV» Color Blindness Ultraviolet Filters > There are 3 types of UV» UVC < 285nm» UVB nm» UVA nm ozone» HEV > 380nm Only 2 materials do not block UV» clear CR-39» clear glass Ultraviolet Filters > On average, 80% of UV exposure will occur prior to age % UV protection is a standard-of-care requirement for all children > Polycarbonate or Trivex > brimmed hats > sunscreen 11

increased contrast sensitivity» selective filtering of glare > sport & vocational applications» watersports» driving Reduction of

12 Photochromic lenses provide > Comfortable vision in nearly all lighting conditions > Complete protection from UV Image courtesy of Transitions Polarized Filters provide > reduction of glare» reflections from flat surfaces are reduced or eliminated > increased contrast sensitivity» selective filtering of glare > sport & vocational applications» watersports» driving Reduction of glare Non-polarized light contains energy along all axes along its direction...a polarizing filter polarizes light along a single axis 12

13 Reduction of glare When light hits a smooth transparent surface, polarization occurs...water causes horizontal polarization Increased contrast sensitivity Non-polarizing filters attenuate light nonselectively, reducing contrast Increased contrast sensitivity Polarizing filters preserve contrast by selectively filtering glare 13

Polarized applications - driving Polarized lenses increase

perception & decreases reaction times Snellen VA 20/10

0 20/32 20/40 20/50 Tinted AR 20/63 Polarized AR 20/80

filters attenuate light evenly across the spectrum-

14 Polarized applications - driving Polarized lenses increase contrast perception & decrease reaction times Polarized applications - driving Polarized lenses increase contrast perception & decreases reaction times Snellen VA 20/10 20/15 20/20 20/ /32 20/40 20/50 Tinted AR 20/63 Polarized AR 20/80 20/100 Contrast Neutral & Selective Filters Neutral (grey) filters attenuate light evenly across the spectrum- selective filters may improve contrast 14

Objective of Filters Filter out harmful / distracting light UV and/or IR reflected glare Transmit useful light preserve contrast manipulate color

(including "contrast enhancing" night driving lenses) Specialty Filters Specialty Filters Filter HEV Blue Light UV and/or Blue Light Reflected glare

15 Objective of Filters Filter out harmful / distracting light UV and/or IR reflected glare Transmit useful light preserve contrast manipulate color perception preserve color perception (neutral grey) alter color perception (all other colors) ALL filters (except UV and AR) reduce light transmission (including "contrast enhancing" night driving lenses) Specialty Filters Specialty Filters Filter HEV Blue Light UV and/or Blue Light Reflected glare Transmits 97.5% light Reduces eye fatigue when using computers, ipads/tablets and mobile devices Color Blindness Eliminates Spectral Overlap ZEISS DuraVision BlueProtect 15

16 Click to edit Master title style Questions? Comments? Substrates (Lens Materials) Premium Substrates Provide > Safety» Impact Resistance» UV Protection» Scratch Resistance > Structural Durability» High Tensile Strength (drill mounts) > Superior Cosmetics» Thin Profile» Optical Clarity > Superior Comfort» Light Weight Substrates (Lens Materials) Safety > Polycarbonate is the only material that retains a constant level of impact resistance in all forms > Polycarbonate resists extreme impact level with any surface treatment UNCOATED HC SURFACE AR SURFACE 16

Substrates (Lens Materials) Safety > All materials MUST pass the FDA

410 > Hard coating and AR coating will greatly reduce impact

Materials) Structural Durability > Tensile strength is a measure of

to splitting in drill mounts Tensile Strength By Material» 80.

67 (MR7)» 61.2 kg/f = Trivex» 52.9 kg/f = 1.70» 44.

17 Substrates (Lens Materials) Safety > All materials MUST pass the FDA drop-ball test» (Federal Law) CFR > Hard coating and AR coating will greatly reduce impact resistance UNCOATED HC SURFACE AR SURFACE Substrates (Lens Materials) Structural Durability > Tensile strength is a measure of a materials ability to resist tearing» This equates into resistance to splitting in drill mounts Tensile Strength By Material» 80.5 kg/f = 1.60 (MR8)» 70 kg/f = 1.67 (MR10)-Approx.» 67.3 kg/f = 1.67 (MR7)» 61.2 kg/f = Trivex» 52.9 kg/f = 1.70» 44.9 kg/f = polycarbonate» 15.6 kg/f = CR-39 80kg Substrates (Lens Materials) Superior Cosmetics > High Index Lenses Reduce Thickness

18 Substrates (Lens Materials) Superior Cosmetics > Optical Clarity Is A Function Of» Transmittance - Perception of white target» Color Rendering - Perception of chromatic target» Contrast - Ability to perceive contrast near and far > Abbe is not a major function of clarity» The eye has approximately 1.00D of linear chromatic aberration (which does not impair vision) - (-10.00D poly lens viewed at 30 produces <0.50D of linear chromatic aberration) Recommending Substrates > Polycarbonate for Safety» Children (Trivex is also a good option)» Monocular patients» Most safety applications > Tensile strength for drill mounts» 1.60, 1.67» Trivex» Polycarbonate > Higher Index for Thinness» 1.60, 1.67, 1.70, 1.74 > Low Specific Gravity for Lightness» Polycarbonate and Trivex Dispensing Click to edit Master title style Questions? Comments? 18

19 Summary > Design» Binocularity = Width» Reduced aberration = Contrast sensitivity» Customization = Potential for greater performance > Coatings» Thermal cure = permanent adhesion» AR Coating = Better Vision and Greatly Improved Cosmetics - Conductive Layer = anti-static - Dissymmetric = hydrophobic Dispensing Summary > Filters» UV» Photochromic's» Polarized» Fixed Tints > Substrates» Polycarbonate for Safety (Trivex)» High Index - Great for Drill Mounts Click to edit Master title style Questions? Comments? 19

20 Special thanks to Michael C. Vitale, ABOM, LDO, NCLC Technical Director & Lens Division Liaison The Vision Council Special Thanks to Pete Hanlin, Technical Director Essilor of America, Inc. 20

LENSES. Materials, Types and Treatments. Mary E. Schmidt, ABOC, CPO

LENSES. Materials, Types and Treatments. Mary E. Schmidt, ABOC, CPO LENSES Materials, Types and Treatments www.eyesystems.info Mary E. Schmidt, ABOC, CPO mary@eyesystems.info Single Vision Spherical in design All purpose, single focus, may be sphere or cylinder Rx s Aspheric