PSY 214 Lecture # (09/14/2011) (Introduction to Vision) Dr. Achtman PSY 214. Lecture 4 Topic: Introduction to Vision Chapter 3, pages 44-54
|
|
- Allen Mervin Mitchell
- 6 years ago
- Views:
Transcription
1 Corrections: A correction needs to be made to NTCO3 on page 3 under excitatory transmitters. It is possible to excite a neuron without sending information to another neuron. For example, in figure 2.12 p. 31, the neuron was excited, but it was not excited to the level to have an action potential (the dotted line). Due to this, the information is not sent to other neurons unless the action potential is reached. A correction also needs to be made on NTC03 on page 3 under relationship between excitatory and inhibitory transmitters on the fifth bullet point. When all the transmitters are inhibitory this also stops the spontaneous firing while the stimulus is applied. This is shown by no action potentials in the stimulated portion of part E in figure Announcements: Dr. Achtman has put the CD that coincides with the textbook in her office mailbox. Lecture Notes: Review PSY 214 Lecture 4 Topic: Introduction to Vision Chapter 3, pages Last class we looked a lot at electricity and the receptive field. Today we will go back and look at Stimulus and Transduction in terms of sight. Transduction occurs on the level of the receptor. It involves changing one type of energy into another. Figure 1.1 p. 6 Written by: Briana Ramirez, Bramire5@mail.naz.edu Page 1 of 8
2 The Stimulus of Vision Figure 3.1 p.44 The stimulus of vision (in humans) is the visible light portion of the electromagnetic spectrum. In figure 3.1 the wavelength goes from shorter on the left to longer on the right. Wavelength is the distance from the peak of one wave to the peak of the next. The electromagnetic spectrum is a continuum of waves. Visible light ranges from nanometers. A nanometer is 10-9 meters. White light includes all wavelengths of visible light. In the visible spectrum of light blue has a shorter wavelength than red. Therefore, different color has different wavelengths. Light can be measured as either a wave or a photon. Most of the light we see is reflected light. Structure of the Eye The first lens of the eye is the cornea. Figure 3.2 p.45 The iris is the color of the eye. In the center of the iris is the pupil, which appears black because it is a whole in the eye. The red portion in figure 3.2 is filled with liquids called Vitreous and Aqueous Humor. The fovea is the center point of focus that contains only cones. The periphery is the images of everything that is not the central focus point, and contains both rods and cones. The light must pass through all these layers to get to the receptors in the retina. All layers of cells in the back of the eye are called the retina. The receptors for light in the retina are called the Rods (purple) and cones (red). Transduction occurs in the rods and cones! Written by: Briana Ramirez, Bramire5@mail.naz.edu Page 2 of 8
3 The attended stimulus is not always the object being focused on the fovea. You can make a conscious effort to make the attended stimulus something in the periphery. In class we used the example of trying to look at an attractive person without blatantly staring at them. The Lens of the Eye The cornea is a fixed lens and does not change shape. It does 80% of the focusing. The only way to change the shape of the cornea is LASIK eye surgery. The lens is adjustable because the ciliary muscles change its shape. The lens does the remaining 20% of the focusing. Astigmatisms are due to the cornea. People with astigmatisms are born with them. Glaucoma is a condition that clouds the optics because the eye does not receive light input. Figure 3.3 p.45 Near Point of Vision: is how near to the eye the object can be and still be in focus The near point moves further away with age. This is called presbyopia. The reason for the near point is the lens. The reason it gets further away with age is because the ciliary muscles weaken and the lens hardens making it harder to accommodate. Rods and Transduction There are 120 million rods, which are named for their rod - shape. Figure 3.4 p.46 Written by: Briana Ramirez, Bramire5@mail.naz.edu Page 3 of 8
4 The outer segment of the rod is called the visual pigment which reacts to photons. This is where transduction occurs. (As well as in the cones, named for their cone - shape.) Figure 3.6 p.48 Opsin and retinal change their shape when a photon interacts with it. This is called isomerization. Figure 3.7 p. 48 This change in shape leads to an enzyme cascade and changes the voltage of the cell. The enzymes help to break down proteins and facilitate the sight process. Retinal Processing and the Distribution of Rods and Cones Differences in Rods and Cones 1) Shape Rods are shaped like long cylinders and Cones are small and tapered 2) Number There are 120 million Rods and 6 Million Cones. 3) Distribution Only Cones are found in the fovea. There are approximately 50,000 cones in this location. Rods and the remainder of the Cones can be found disbursed along the periphery. There are more rods then cones in the periphery. Written by: Briana Ramirez, Bramire5@mail.naz.edu Page 4 of 8
5 PSY 214 Lecture # (09/14/2011) (Introduction to Vision) Dr. Achtman Figure 3.12 p. 51 The Blind Spot is where there are NO Rods or Cones. The reason for the blind spot is because it is where the Optic Nerve exits your eyeball. Therefore, if an object is in your blind spot you are not able to see it. The blind spot is different in people because it depends on the angle at which the nerve leaves the eye. The reason you are often unaware of your blind spot is for several reasons: 1) You are constantly moving your eyes 2) Your brain will fill in the empty space based off your surroundings 3) the blind spot is in different locations in each eye Figure 3.14 p. 52 Retinal Diseases Macular Degeneration - people cannot see what they direct their eyes to - the macula is the fovea plus a little bit of the surrounding area - It is age related and there are some medications to slow it down - This is represented by part (a) in Figure 3.13 Retinitis Pigmentosa extreme tunnel vision - there is a genetic component and it gets worse as it progresses - This is represented by part (b) in Figure 3.13 Written by: Briana Ramirez, Bramire5@mail.naz.edu Page 5 of 8
6 Dark Adaptation Figure 3.13 p. 53 The dark adaptation experiment starts with the lights turned on. The experiment officially begins when the lights are then turned off. The method of adjustment is used so that the observer can adjust the light so they can just barely see it is there. The experiment takes minutes to complete. Figure 3.18 p. 53 We are now going to see how rods, cones, and rods and cones together adjust to the dark. - In figure 3.19 the bottom of the scale reads High, which means dimmer light and high sensitivity. The top of the scale reads Low, referring to low sensitivity and bright light. The green curve represents only cones and this is done by shining the light directly in front of the observer so that it lands on their fovea. This shows that cones adjust rapidly to the dark in the first six minutes, however after this point they level off and do not become and more sensitive to the dark as time goes on. Written by: Briana Ramirez, Bramire5@mail.naz.edu Page 6 of 8
7 The purple line represents only rods. This shows that they adapt more slowly to the dark, but after the first 10 minutes they continue to adapt to the darkness and allow for our night vision more than cones after this ten minute mark. They way that they study only rods is to use patients who are monochromats which means they were born without cones and can only see in black, white, and shades of grey. The red line is a mixture of both rods and cones. We can see that this line is a mixture of the two individual curves. It mimics the cones curve for the first 10 minutes because that is what controls our vision. However, after those ten minutes are up it mimics the rods because they take over the night vision. Figure 3.19 p. 54 For more information: This youtube video describes the structure of the eye and how light is focused on the retina and relayed to the brain. This youtube video is good for seeing how the lens changes shape depending on how close or far away an abject is. (Accommodation) This youtube video is interesting if you would like to know how the LASIK eye surgery procedure is completed. - This website goes into detail on how our ideas of how we see have changed since the time of Aristotle. It also goes over the biological structure of the eye and explains opsin and retinal again if you need clarification. Real-life example: Every day light reflects off of objects and then enters our eye and is focused through our lenses and displayed on our retina. For example, as college students nearly every day we go to class and see the teacher either writing on the blackboard, or we look at slides they have prepared. Written by: Briana Ramirez, Bramire5@mail.naz.edu Page 7 of 8
8 Depending on how close or far away you sit from the blackboard depends on how your eye compensates for the reflected light. This also can be seen in everyday life by people who wear glasses. This shows that their lens have trouble adapting in order to present a clear image on the retina. Therefore, an additional lens is added by the persons wearing of glasses. Written by: Briana Ramirez, Bramire5@mail.naz.edu Page 8 of 8
Chapter 2: The Beginnings of Perception
Chapter 2: The Beginnings of Perception We ll see the first three steps of the perceptual process for vision https:// 49.media.tumblr.co m/ 87423d97f3fbba8fa4 91f2f1bfbb6893/ tumblr_o1jdiqp4tc1 qabbyto1_500.gif
More informationBiology 70 Slides for Lecture 1 Fall 2007
Biology 70 Part II Sensory Systems www.biology.ucsc.edu 1 2 intensity vs spatial position (image formation) color 3 4 motion depth (monocular) 5 6 1 depth (binocular) 1. In the lectures on perception we
More informationVision. By: Karen, Jaqui, and Jen
Vision By: Karen, Jaqui, and Jen Activity: Directions: Stare at the black dot in the center of the picture don't look at anything else but the black dot. When we switch the picture you can look around
More informationThe Special Senses: Vision
OLLI Lecture 5 The Special Senses: Vision Vision The eyes are the sensory organs for vision. They collect light waves through their photoreceptors (located in the retina) and transmit them as nerve impulses
More informationEarly Visual Processing: Receptive Fields & Retinal Processing (Chapter 2, part 2)
Early Visual Processing: Receptive Fields & Retinal Processing (Chapter 2, part 2) Lecture 5 Jonathan Pillow Sensation & Perception (PSY 345 / NEU 325) Princeton University, Spring 2015 1 Summary of last
More informationRetina. Convergence. Early visual processing: retina & LGN. Visual Photoreptors: rods and cones. Visual Photoreptors: rods and cones.
Announcements 1 st exam (next Thursday): Multiple choice (about 22), short answer and short essay don t list everything you know for the essay questions Book vs. lectures know bold terms for things that
More informationEYE. The eye is an extension of the brain
I SEE YOU EYE The eye is an extension of the brain Eye brain proxomity Can you see : the optic nerve bundle? Spinal cord? The human Eye The eye is the sense organ for light. Receptors for light are found
More informationTHE EYE. People of Asian descent have an EPICANTHIC FOLD in the upper eyelid; no functional difference.
THE EYE The eye is in the orbit of the skull for protection. Within the orbit are 6 extrinsic eye muscles, which move the eye. There are 4 cranial nerves: Optic (II), Occulomotor (III), Trochlear (IV),
More informationVisual System I Eye and Retina
Visual System I Eye and Retina Reading: BCP Chapter 9 www.webvision.edu The Visual System The visual system is the part of the NS which enables organisms to process visual details, as well as to perform
More informationIII: Vision. Objectives:
III: Vision Objectives: Describe the characteristics of visible light, and explain the process by which the eye transforms light energy into neural. Describe how the eye and the brain process visual information.
More informationVision. The eye. Image formation. Eye defects & corrective lenses. Visual acuity. Colour vision. Lecture 3.5
Lecture 3.5 Vision The eye Image formation Eye defects & corrective lenses Visual acuity Colour vision Vision http://www.wired.com/wiredscience/2009/04/schizoillusion/ Perception of light--- eye-brain
More information2 The First Steps in Vision
2 The First Steps in Vision 2 The First Steps in Vision A Little Light Physics Eyes That See light Retinal Information Processing Whistling in the Dark: Dark and Light Adaptation The Man Who Could Not
More informationAP PSYCH Unit 4.2 Vision 1. How does the eye transform light energy into neural messages? 2. How does the brain process visual information? 3.
AP PSYCH Unit 4.2 Vision 1. How does the eye transform light energy into neural messages? 2. How does the brain process visual information? 3. What theories help us understand color vision? 4. Is your
More informationTopic 4: Lenses and Vision. Lens a curved transparent material through which light passes (transmit) Ex) glass, plastic
Topic 4: Lenses and Vision Lens a curved transparent material through which light passes (transmit) Ex) glass, plastic Double Concave Lenses Are thinner and flatter in the middle than around the edges.
More information11/23/11. A few words about light nm The electromagnetic spectrum. BÓDIS Emőke 22 November Schematic structure of the eye
11/23/11 A few words about light 300-850nm 400-800 nm BÓDIS Emőke 22 November 2011 The electromagnetic spectrum see only 1/70 of the electromagnetic spectrum The External Structure: The Immediate Structure:
More information10/8/ dpt. n 21 = n n' r D = The electromagnetic spectrum. A few words about light. BÓDIS Emőke 02 October Optical Imaging in the Eye
A few words about light BÓDIS Emőke 02 October 2012 Optical Imaging in the Eye Healthy eye: 25 cm, v1 v2 Let s determine the change in the refractive power between the two extremes during accommodation!
More informationExam 3--PHYS 151--S15
Name: Class: Date: Exam 3--PHYS 151--S15 Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Consider this diagram of the eye and answer the following questions.
More informationChapter Human Vision
Chapter 6 6.1 Human Vision How Light Enters the Eye Light enters the eye through the pupil. The pupil appears dark because light passes through it without reflecting back Pupil Iris = Coloured circle of
More informationThe Human Eye and a Camera 12.1
The Human Eye and a Camera 12.1 The human eye is an amazing optical device that allows us to see objects near and far, in bright light and dim light. Although the details of how we see are complex, the
More informationSensation. What is Sensation, Perception, and Cognition. All sensory systems operate the same, they only use different mechanisms
Sensation All sensory systems operate the same, they only use different mechanisms 1. Have a physical stimulus (e.g., light) 2. The stimulus emits some sort of energy 3. Energy activates some sort of receptor
More informationSensation. Sensation. Perception. What is Sensation, Perception, and Cognition
All sensory systems operate the same, they only use different mechanisms Sensation 1. Have a physical stimulus (e.g., light) 2. The stimulus emits some sort of energy 3. Energy activates some sort of receptor
More informationChapter Six Chapter Six
Chapter Six Chapter Six Vision Sight begins with Light The advantages of electromagnetic radiation (Light) as a stimulus are Electromagnetic energy is abundant, travels VERY quickly and in fairly straight
More informationSCIENCE 8 WORKBOOK Chapter 6 Human Vision Ms. Jamieson 2018 This workbook belongs to:
SCIENCE 8 WORKBOOK Chapter 6 Human Vision Ms. Jamieson 2018 This workbook belongs to: Eric Hamber Secondary 5025 Willow Street Vancouver, BC Table of Contents A. Chapter 6.1 Parts of the eye.. Parts of
More informationChapter 6 Human Vision
Chapter 6 Notes: Human Vision Name: Block: Human Vision The Humane Eye: 8) 1) 2) 9) 10) 4) 5) 11) 12) 3) 13) 6) 7) Functions of the Eye: 1) Cornea a transparent tissue the iris and pupil; provides most
More informationEYE ANATOMY. Multimedia Health Education. Disclaimer
Disclaimer This movie is an educational resource only and should not be used to manage your health. The information in this presentation has been intended to help consumers understand the structure and
More informationEYE STRUCTURE AND FUNCTION
Name: Class: Date: EYE STRUCTURE AND FUNCTION The eye is the body s organ of sight. It gathers light from the environment and forms an image on specialized nerve cells on the retina. Vision occurs when
More informationPHGY Physiology. The Process of Vision. SENSORY PHYSIOLOGY Vision. Martin Paré. Visible Light. Ocular Anatomy. Ocular Anatomy.
PHGY 212 - Physiology SENSORY PHYSIOLOGY Vision Martin Paré Assistant Professor of Physiology & Psychology pare@biomed.queensu.ca http://brain.phgy.queensu.ca/pare The Process of Vision Vision is the process
More informationPHGY Physiology. SENSORY PHYSIOLOGY Vision. Martin Paré
PHGY 212 - Physiology SENSORY PHYSIOLOGY Vision Martin Paré Assistant Professor of Physiology & Psychology pare@biomed.queensu.ca http://brain.phgy.queensu.ca/pare The Process of Vision Vision is the process
More informationNovember 14, 2017 Vision: photoreceptor cells in eye 3 grps of accessory organs 1-eyebrows, eyelids, & eyelashes 2- lacrimal apparatus:
Vision: photoreceptor cells in eye 3 grps of accessory organs 1-eyebrows, eyelids, & eyelashes eyebrows: protection from debris & sun eyelids: continuation of skin, protection & lubrication eyelashes:
More informationSeeing and Perception. External features of the Eye
Seeing and Perception Deceives the Eye This is Madness D R Campbell School of Computing University of Paisley 1 External features of the Eye The circular opening of the iris muscles forms the pupil, which
More informationSCIENCE 8 WORKBOOK Chapter 6 Human Vision Ms. Jamieson 2018 This workbook belongs to:
SCIENCE 8 WORKBOOK Chapter 6 Human Vision Ms. Jamieson 2018 This workbook belongs to: Eric Hamber Secondary 5025 Willow Street Vancouver, BC Table of Contents A. Chapter 6.1 Parts of the eye.. Parts of
More informationSlide 4 Now we have the same components that we find in our eye. The analogy is made clear in this slide. Slide 5 Important structures in the eye
Vision 1 Slide 2 The obvious analogy for the eye is a camera, and the simplest camera is a pinhole camera: a dark box with light-sensitive film on one side and a pinhole on the other. The image is made
More informationChapter 11 Lesson 4 THE EYE
Chapter 11 Lesson 4 THE EYE Eye Openers Museum of Vision You need a couple blank sheets of paper. Label each side #1 How We See #2 Binocular Vision #3 Optical Illusions #4 Persistence of Vision On Packet
More informationVision. By. Leanora Thompson, Karen Vega, and Abby Brainerd
Vision By. Leanora Thompson, Karen Vega, and Abby Brainerd Anatomy Outermost part of the eye is the Sclera. Cornea transparent part of outer layer Two cavities by the lens. Anterior cavity = Aqueous humor
More informationVision. PSYCHOLOGY (8th Edition, in Modules) David Myers. Module 13. Vision. Vision
PSYCHOLOGY (8th Edition, in Modules) David Myers PowerPoint Slides Aneeq Ahmad Henderson State University Worth Publishers, 2007 1 Vision Module 13 2 Vision Vision The Stimulus Input: Light Energy The
More informationHW- Finish your vision book!
March 1 Table of Contents: 77. March 1 & 2 78. Vision Book Agenda: 1. Daily Sheet 2. Vision Notes and Discussion 3. Work on vision book! EQ- How does vision work? Do Now 1.Find your Vision Sensation fill-in-theblanks
More informationThe Physiology of the Senses Lecture 1 - The Eye
The Physiology of the Senses Lecture 1 - The Eye www.tutis.ca/senses/ Contents Objectives... 2 Introduction... 2 Accommodation... 3 The Iris... 4 The Cells in the Retina... 5 Receptive Fields... 8 The
More informationThe eye* The eye is a slightly asymmetrical globe, about an inch in diameter. The front part of the eye (the part you see in the mirror) includes:
The eye* The eye is a slightly asymmetrical globe, about an inch in diameter. The front part of the eye (the part you see in the mirror) includes: The iris (the pigmented part) The cornea (a clear dome
More informationThe Human Eye: Structures
The Human Eye: Structures We will look at the following parts: Take notes on this page CORNEA (clear lens in front of eye) transparent covering of the front of the eye Allows for the passage of light
More information25 Things To Know. Vision
25 Things To Know Vision Magnetism Electromagnetic Energy Electricity Magnetism Electromagnetic Energy Electricity Light Frequency Amplitude Light Frequency How often it comes Wave length Peak to peak
More informationLecture 8. Lecture 8. r 1
Lecture 8 Achromat Design Design starts with desired Next choose your glass materials, i.e. Find P D P D, then get f D P D K K Choose radii (still some freedom left in choice of radii for minimization
More informationEye. Eye Major structural layer of the wall of the eye is a thick layer of dense C.T.; that layer has two parts:
General aspects Sensory receptors ; External or internal environment. A stimulus is a change in the environmental condition which is detectable by a sensory receptor 1 Major structural layer of the wall
More informationVision Science I Exam 1 23 September ) The plot to the right shows the spectrum of a light source. Which of the following sources is this
Vision Science I Exam 1 23 September 2016 1) The plot to the right shows the spectrum of a light source. Which of the following sources is this spectrum most likely to be taken from? A) The direct sunlight
More informationWhat determines data speed?
PHY385-H1F Introductory Optics Class 12 Outline: Section 5.7, Sub-sections 5.7.1 5.7.6 Fibre-Optics The Human Eye Corrective Lenses Pinhole Camera Camera Depth of Field What determines data speed? Broadband
More informationiris pupil cornea ciliary muscles accommodation Retina Fovea blind spot
Chapter 6 Vision Exam 1 Anatomy of vision Primary visual cortex (striate cortex, V1) Prestriate cortex, Extrastriate cortex (Visual association coretx ) Second level association areas in the temporal and
More informationCow Eye Dissection. Online dissection, for kids abstaining:
Cow Eye Dissection Introductory Discussion: Tell the students that we will be learning about what eyes are made of and how they work by dissecting a cow eye. Talk about where the eye comes from, and how
More informationA&P 1 Eye & Vision Lab Vision Concepts
A&P 1 Eye & Vision Lab Vision Concepts In this "Lab Exercise Guide", we will be looking at the basics of vision. NOTE: these notes do not follow the order of the videos. You should be able to read this
More informationCOW S EYE. dissection. Dissecting a Cow s Eye Step-by-Step Instructions. Safety first!
COW S EYE dissection Dissecting a Cow s Eye Step-by-Step Instructions One way to figure out how something works is to look inside it. To learn about how your eyes work, you can dissect, or take apart,
More informationLO - Lab #06 - The Amazing Human Eye
LO - Lab #06 - In this lab you will examine and model one of the most amazing optical systems you will ever encounter: the human eye. You might find it helpful to review the anatomy and function of the
More informationPhotography (cont d)
Lecture 13 Ch. 4 Photography continued Ch. 5 The Eye Feb. 23, 2010 Exams will be back on Feb. 25 Homework 5 is due Feb. 25 Read all of Ch. 5. on The Eye. 1 Photography (cont d) Polarizing and haze filters
More informationSense Organs (Eye) The eye is the sense organ of sight. The eye is shaped like a ball and is located in bony
Sense Organs (Eye) The eye is the sense organ of sight. The eye is shaped like a ball and is located in bony sockets in the skull. It is held in place by six muscles which are joined to the outside of
More informationChapter 20 Human Vision
Chapter 20 GOALS When you have mastered the contents of this chapter, you will be able to achieve the following goals: Characterize the physical parameters that are significant in human vision. Visual
More informationLecture 2 Digital Image Fundamentals. Lin ZHANG, PhD School of Software Engineering Tongji University Fall 2016
Lecture 2 Digital Image Fundamentals Lin ZHANG, PhD School of Software Engineering Tongji University Fall 2016 Contents Elements of visual perception Light and the electromagnetic spectrum Image sensing
More informationPsych 333, Winter 2008, Instructor Boynton, Exam 1
Name: Class: Date: Psych 333, Winter 2008, Instructor Boynton, Exam 1 Multiple Choice There are 35 multiple choice questions worth one point each. Identify the letter of the choice that best completes
More informationDigital Image Processing
Digital Image Processing Lecture # 3 Digital Image Fundamentals ALI JAVED Lecturer SOFTWARE ENGINEERING DEPARTMENT U.E.T TAXILA Email:: ali.javed@uettaxila.edu.pk Office Room #:: 7 Presentation Outline
More information12.1. Human Perception of Light. Perceiving Light
12.1 Human Perception of Light Here is a summary of what you will learn in this section: Focussing of light in your eye is accomplished by the cornea, the lens, and the fluids contained in your eye. Light
More informationScience 8 Unit 2 Pack:
Science 8 Unit 2 Pack: Name Page 0 Section 4.1 : The Properties of Waves Pages By the end of section 4.1 you should be able to understand the following: Waves are disturbances that transmit energy from
More informationSensory receptors External internal stimulus change detectable energy transduce action potential different strengths different frequencies
General aspects Sensory receptors ; respond to changes in the environment. External or internal environment. A stimulus is a change in the environmental condition which is detectable by a sensory receptor
More informationLife Science Chapter 2 Study Guide
Key concepts and definitions Waves and the Electromagnetic Spectrum Wave Energy Medium Mechanical waves Amplitude Wavelength Frequency Speed Properties of Waves (pages 40-41) Trough Crest Hertz Electromagnetic
More informationVision Basics Measured in:
Vision Vision Basics Sensory receptors in our eyes transduce light into meaningful images Light = packets of waves Measured in: Brightness amplitude of wave (high=bright) Color length of wave Saturation
More informationMaterials Cow eye, dissecting pan, dissecting kit, safety glasses, lab apron, and gloves
Cow Eye Dissection Guide Introduction How do we see? The eye processes the light through photoreceptors located in the eye that send signals to the brain and tells us what we are seeing. There are two
More informationVisual Optics. Visual Optics - Introduction
Visual Optics Jim Schwiegerling, PhD Ophthalmology & Optical Sciences University of Arizona Visual Optics - Introduction In this course, the optical principals behind the workings of the eye and visual
More informationBLOSSOMS_- What s_in_an_eye?
BLOSSOMS_- What s_in_an_eye? Hello and welcome. My name is Ishara Mills-Henry, and I am the director of a program called Science of the Eye: Bringing Vision into the Classroom. This program is based in
More informationChapter 25: Applied Optics. PHY2054: Chapter 25
Chapter 25: Applied Optics PHY2054: Chapter 25 1 Operation of the Eye 24 mm PHY2054: Chapter 25 2 Essential parts of the eye Cornea transparent outer structure Pupil opening for light Lens partially focuses
More informationLESSON 5 - THE OPTICS OF THE EYE
LESSON 5 - THE OPTICS OF THE EYE Overview: By dissecting a mammalian eye, students will learn how the lens in the eye focuses light to form an image of an object. They will also learn the main parts of
More informationSpatial Vision: Primary Visual Cortex (Chapter 3, part 1)
Spatial Vision: Primary Visual Cortex (Chapter 3, part 1) Lecture 6 Jonathan Pillow Sensation & Perception (PSY 345 / NEU 325) Princeton University, Fall 2017 Eye growth regulation KL Schmid, CF Wildsoet
More informationRefraction of Light. Refraction of Light
1 Refraction of Light Activity: Disappearing coin Place an empty cup on the table and drop a penny in it. Look down into the cup so that you can see the coin. Move back away from the cup slowly until the
More informationHandout 1: Color Survey
Handout : Color Survey Have you ever thought about whether everyone sees colors in the same way? Here s your chance to find out! Your teacher will display crayons or slides. Categorize each of the 5 colors
More informationVision and Color. Reading. Optics, cont d. Lenses. d d f. Brian Curless CSE 557 Autumn Good resources:
Reading Good resources: Vision and Color Brian Curless CSE 557 Autumn 2015 Glassner, Principles of Digital Image Synthesis, pp. 5-32. Palmer, Vision Science: Photons to Phenomenology. Wandell. Foundations
More informationVision and Color. Brian Curless CSE 557 Autumn 2015
Vision and Color Brian Curless CSE 557 Autumn 2015 1 Reading Good resources: Glassner, Principles of Digital Image Synthesis, pp. 5-32. Palmer, Vision Science: Photons to Phenomenology. Wandell. Foundations
More informationVision and Color. Reading. Optics, cont d. Lenses. d d f. Brian Curless CSEP 557 Fall Good resources:
Reading Good resources: Vision and Color Brian Curless CSEP 557 Fall 2016 Glassner, Principles of Digital Image Synthesis, pp. 5-32. Palmer, Vision Science: Photons to Phenomenology. Wandell. Foundations
More informationVision and Color. Brian Curless CSEP 557 Fall 2016
Vision and Color Brian Curless CSEP 557 Fall 2016 1 Reading Good resources: Glassner, Principles of Digital Image Synthesis, pp. 5-32. Palmer, Vision Science: Photons to Phenomenology. Wandell. Foundations
More informationChapter 25. Optical Instruments
Chapter 25 Optical Instruments Optical Instruments Analysis generally involves the laws of reflection and refraction Analysis uses the procedures of geometric optics To explain certain phenomena, the wave
More informationVisual Perception of Images
Visual Perception of Images A processed image is usually intended to be viewed by a human observer. An understanding of how humans perceive visual stimuli the human visual system (HVS) is crucial to the
More informationThe best retinal location"
How many photons are required to produce a visual sensation? Measurement of the Absolute Threshold" In a classic experiment, Hecht, Shlaer & Pirenne (1942) created the optimum conditions: -Used the best
More informationBIOPHYSICS OF VISION GEOMETRIC OPTICS OF HUMAN EYE. Refraction media of the human eye. D eye = 63 diopter, D cornea =40, D lens = 15+
BIOPHYSICS OF VISION THEORY OF COLOR VISION ELECTRORETINOGRAM Two problems: All cows are black in dark! Playing tennis in dark with illuminated lines, rackets, net, and ball! Refraction media of the human
More informationHandout G: The Eye and How We See
Handout G: The Eye and How We See Prevent Blindness America. (2003c). The eye and how we see. Retrieved July 31, 2003, from http://www.preventblindness.org/resources/howwesee.html Your eyes are wonderful
More informationClass 10 Science NCERT Exemplar Solutions Human Eye and Colourful World
Class 10 Science NCERT Exemplar Solutions Human Eye and Colourful World Short Answer Questions Question 1. A student sitting at the back of the classroom cannot read clearly the letters written on the
More informationA piece of white paper can be 1,000,000,000 times brighter in outdoor sunlight than in a moonless night.
Light intensities range across 9 orders of magnitude. A piece of white paper can be 1,000,000,000 times brighter in outdoor sunlight than in a moonless night. But in a given lighting condition, light ranges
More information4. Cut away the fat and muscle.
1. Safety first! You ll be using a scalpel or a razor to cut the cow s eye. Be careful. A scalpel or razor can cut you as easily as it cuts the cow s eye. Whenever you handle raw meat (whether it s a cow
More informationThe Human Visual System. Lecture 1. The Human Visual System. The Human Eye. The Human Retina. cones. rods. horizontal. bipolar. amacrine.
Lecture The Human Visual System The Human Visual System Retina Optic Nerve Optic Chiasm Lateral Geniculate Nucleus (LGN) Visual Cortex The Human Eye The Human Retina Lens rods cones Cornea Fovea Optic
More informationThe Human Eye Looking at your own eye with an Eye Scope
The Human Eye Looking at your own eye with an Eye Scope Rochelle Payne Ondracek Edited by Anne Starace Abstract The human ability to see is the result of an intricate interconnection of muscles, receptors
More informationFurther reading. 1. Visual perception. Restricting the light. Forming an image. Angel, section 1.4
Further reading Angel, section 1.4 Glassner, Principles of Digital mage Synthesis, sections 1.1-1.6. 1. Visual perception Spencer, Shirley, Zimmerman, and Greenberg. Physically-based glare effects for
More informationSpecial Senses- THE EYE. Pages
Special Senses- THE EYE Pages 548-569 Accessory Structures Eyebrows Eyelids Conjunctiva Lacrimal Apparatus Extrinsic Eye Muscles EYEBROWS Deflect debris to side of face Facial recognition Nonverbal communication
More informationLecture 8. Human Information Processing (1) CENG 412-Human Factors in Engineering May
Lecture 8. Human Information Processing (1) CENG 412-Human Factors in Engineering May 30 2009 1 Outline Visual Sensory systems Reading Wickens pp. 61-91 2 Today s story: Textbook page 61. List the vision-related
More informationVision: How does your eye work? Student Advanced Version Vision Lab - Overview
Vision: How does your eye work? Student Advanced Version Vision Lab - Overview In this lab, we will explore some of the capabilities and limitations of the eye. We will look Sight at is the one extent
More informationVision and Color. Reading. The lensmaker s formula. Lenses. Brian Curless CSEP 557 Autumn Good resources:
Reading Good resources: Vision and Color Brian Curless CSEP 557 Autumn 2017 Glassner, Principles of Digital Image Synthesis, pp. 5-32. Palmer, Vision Science: Photons to Phenomenology. Wandell. Foundations
More informationReading. 1. Visual perception. Outline. Forming an image. Optional: Glassner, Principles of Digital Image Synthesis, sections
Reading Optional: Glassner, Principles of Digital mage Synthesis, sections 1.1-1.6. 1. Visual perception Brian Wandell. Foundations of Vision. Sinauer Associates, Sunderland, MA, 1995. Research papers:
More informationGeneral Physics - E&M (PHY 1308) - Lecture Notes. General Physics - E&M (PHY 1308) Lecture Notes
General Physics - E&M (PHY 1308) Lecture Notes Lecture 036: Application of Lenses - the Human Eye SteveSekula, 1 December 2010 (created 30 November 2010) Goals of this lecture no tags conclude the discussion
More informationRetinal stray light originating from intraocular lenses and its effect on visual performance van der Mooren, Marie Huibert
University of Groningen Retinal stray light originating from intraocular lenses and its effect on visual performance van der Mooren, Marie Huibert IMPORTANT NOTE: You are advised to consult the publisher's
More informationThe Eye and Vision. Activities: Linda Shore, Ed.D. Exploratorium Teacher Institute Exploratorium, all rights reserved
The Eye and Vision By Linda S. Shore, Ed.D. Director,, San Francisco, California, United States lindas@exploratorium.edu Activities: Film Can Eyeglasses a pinhole can help you see better Vessels using
More informationThe Human Brain and Senses: Memory
The Human Brain and Senses: Memory Methods of Learning Learning - There are several types of memory, and each is processed in a different part of the brain. Remembering Mirror Writing Today we will be.
More informationTHE STUDY OF WHICH SHADE OF SUNGLASSES BLOCK THE MOST LIGHT
THE STUDY OF WHICH SHADE OF SUNGLASSES BLOCK THE MOST LIGHT Kiera Tai Cary Academy ABSTRACT The purpose of this experiment was to determine which color tint of sunglasses would block the most light. Sunglasses
More informationPhysical Science Physics
Name Physical Science Physics C/By Due Date Code Period Earned Points PSP 5W4 Seeing Problems (divide by 11) Multiple Choice Identify the letter of the choice that best completes the statement or answers
More informationLight. Path of Light. Looking at things. Depth and Distance. Getting light to imager. CS559 Lecture 2 Lights, Cameras, Eyes
CS559 Lecture 2 Lights, Cameras, Eyes These are course notes (not used as slides) Written by Mike Gleicher, Sept. 2005 Adjusted after class stuff we didn t get to removed / mistakes fixed Light Electromagnetic
More informationThe Human Eye Nearpoint of vision
The Human Eye Nearpoint of vision Rochelle Payne Ondracek Edited by Anne Starace Abstract The human ability to see is the result of an intricate interconnection of muscles, receptors and neurons. Muscles
More informationThe Eye. Morphology of the eye (continued) Morphology of the eye. Sensation & Perception PSYC Thomas E. Van Cantfort, Ph.D
Sensation & Perception PSYC420-01 Thomas E. Van Cantfort, Ph.D The Eye The Eye The function of the eyeball is to protect the photoreceptors The role of the eye is to capture an image of objects that we
More informationABO Certification Training. Part I: Anatomy and Physiology
ABO Certification Training Part I: Anatomy and Physiology Major Ocular Structures Centralis Nerve Major Ocular Structures The Cornea Cornea Layers Epithelium Highly regenerative: Cells reproduce so rapidly
More informationAspects of Vision. Senses
Lab is modified from Meehan (1998) and a Science Kit lab 66688 50. Vision is the act of seeing; vision involves the transmission of the physical properties of an object from an object, through the eye,
More informationPHYSICS. Chapter 35 Lecture FOR SCIENTISTS AND ENGINEERS A STRATEGIC APPROACH 4/E RANDALL D. KNIGHT
PHYSICS FOR SCIENTISTS AND ENGINEERS A STRATEGIC APPROACH 4/E Chapter 35 Lecture RANDALL D. KNIGHT Chapter 35 Optical Instruments IN THIS CHAPTER, you will learn about some common optical instruments and
More information