November 14, 2017 Vision: photoreceptor cells in eye 3 grps of accessory organs 1-eyebrows, eyelids, & eyelashes 2- lacrimal apparatus:

Size: px
Start display at page:

Download "November 14, 2017 Vision: photoreceptor cells in eye 3 grps of accessory organs 1-eyebrows, eyelids, & eyelashes 2- lacrimal apparatus:"

Transcription

1 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: trap dirt, help lubricate eye 2- lacrimal apparatus: produces tears to clean eye, lubricates eye 3-extrinsic eye muscles: 3 pairs of muscles that anchor & move eye eyeball is elongated sphere, 2.5 cm diameter entire eyeball has 3 layers of tissues or coats 1- sclera: white fibrous connect tissue outermost layer, encircles entire eye anteriorly it is transparent, forms cornea posteriorly it is opaque protects eye, supports eyeball 2-choroid coat: middle layer, contains blood vessels anteriorly forms iris, pupil, ciliary body posteriorly dark pigment, absorbs stray light rays, also nourishes retina 3-retina: innermost layer of eye thin membrane containing photoreceptors attached anteriorly to ciliary body attached posteriorly to optic nerve only 2 attachmts, can become loosened, problem

2 eye structures from anterior to posterior cornea: tough membrane through which light is admitted to eye part of sclera (tough connect tiss) but clear, protects eye and refracts light rays aqueous humor: anterior chamber of eye, watery fluid between cornea & iris, protects eye, helps eye keep shape, refracts light rays iris: colored part of eye, surrounds pupil, anterior to lens, formed from choroid layer, regulates the size of pupil, protects eye from intense light pupil: black circular opening in center of iris, admits light into eye ciliary body: part of choroid layer, holds lens in place, allows lens to accommodate lens: hard, but flexible oval, refracts & focuses light rays on retina, divides eye into anterior & posterior parts vitreous humor: jellylike fluid filling posterior chamber of eye, helps eyeball keep its shape, refracts light rays retina: innermost layer, contains photoreceptive cells, rods & cones, sends light info to brain rods: photoreceptor cells on retina, responsible for black & white vision, function in low light levels cones: photoreceptor cells on retina, responsible for color vision, function in high light levels fovea centralis: depression on retina, area of greatest concentration of cones, greatest visual acuity optic nerve: exits eye posteriorly, carries light info to brain there are no rods nor cones at spot where nerve exits eye so this a blind spot tapetum lucidum: a beautiful layer of choroid only seen in animals w/night vision, reflective layer that improves night vision, not in humans

3 Vision Physiology Focusing: to form images, light must land on photoreceptor cells on retina lens refracts (bends) light rays to land on retina cornea, aqueous humor, vitreous humor also refract light rays lens also changes shape to focus rays on retina "normal" eyeball is optimal shape for light to land on retina to focus on distant objects, lens is flattened, relaxed to focus close up, lens must be rounded we evolved for optimal sight distance to be 20ft away thus eye charts measure from 20ft near-sightedness, myopia: due to elongated eyeball can see close objects, but can't see letters 20 ft away lens focuses in front of retina for distant object concave lens fixes problem far-sightedness, hyperopia: due to shortened eyeball can see distant objects, but not close up lens focuses light rays behind retina convex lens fixes problem

4 Focusing continued accomodation: ability of the lens to change shape when viewing things up close when viewing close objects, ciliary muscle contracts, lens becomes more convex, rounded when viewing distant objects, ciliary muscle relaxes, lens flattens as you age, the lens loses its elasticity, can't round up for close viewing photopupillary reflex: when light entering the eye is intense, circular muscles of iris contract, size of pupil decreases when light entering eye is dim, circular muscles of iris relax, allowing more light in, size of pupil increases convergence reflex: as object being viewed moves closer to eyes, eyeballs move medially in order for light rays to strike equivalent spots on retina

5 Eye problems astigmatism: uneven cornea, dips in cornea light rays aren't evenly focused fuzzy areas in field of view glaucoma: buildup of fluid in anterior chamber due to duct blockage pressure compresses arteries that serve retina nerve fibers can die, blindness can result lasik eye surgery retinal detachment, macular degeneration, etc. Misc. do eyes grow? yes, but not by much at birth, eyes are 16 mm at age 3, the eye is 23 mm adult size, 25 mm or 2.5 cm

EYE ANATOMY. Multimedia Health Education. Disclaimer

EYE 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 information

EYE STRUCTURE AND FUNCTION

EYE 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 information

Coarse hairs that overlie the supraorbital margins Functions include: Shading the eye Preventing perspiration from reaching the eye

Coarse hairs that overlie the supraorbital margins Functions include: Shading the eye Preventing perspiration from reaching the eye SPECIAL SENSES (INDERA KHUSUS) Dr.Milahayati Daulay Departemen Fisiologi FK USU Eye and Associated Structures 70% of all sensory receptors are in the eye Most of the eye is protected by a cushion of fat

More information

Topic 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 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 information

Special Senses- THE EYE. Pages

Special 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 information

EYE. The eye is an extension of the brain

EYE. 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 information

The Eye. Nakhleh Abu-Yaghi, M.B.B.S Ophthalmology Division

The Eye. Nakhleh Abu-Yaghi, M.B.B.S Ophthalmology Division The Eye Nakhleh Abu-Yaghi, M.B.B.S Ophthalmology Division Coats of the Eyeball 1- OUTER FIBROUS COAT is made up of : Posterior opaque part 2-THE SCLERA the dense white part 1- THE CORNEA the anterior

More information

Chapter 6 Human Vision

Chapter 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 information

THE EYE. People of Asian descent have an EPICANTHIC FOLD in the upper eyelid; no functional difference.

THE 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 information

Vision. By: Karen, Jaqui, and Jen

Vision. 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 information

PHGY Physiology. The Process of Vision. SENSORY PHYSIOLOGY Vision. Martin Paré. Visible Light. Ocular Anatomy. Ocular Anatomy.

PHGY 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 information

PHGY Physiology. SENSORY PHYSIOLOGY Vision. Martin Paré

PHGY 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 information

2 The First Steps in Vision

2 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 information

SCIENCE 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: 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 information

SCIENCE 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: 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 information

Chapter Human Vision

Chapter 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 information

Handout G: The Eye and How We See

Handout 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 information

Vision. By. Leanora Thompson, Karen Vega, and Abby Brainerd

Vision. 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 information

Sense 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 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 information

Eye. Eye Major structural layer of the wall of the eye is a thick layer of dense C.T.; that layer has two parts:

Eye. 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 information

ABO Certification Training. Part I: Anatomy and Physiology

ABO 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 information

4Basic anatomy and physiology

4Basic anatomy and physiology Hene_Ch09.qxd 8/30/04 6:51 AM Page 348 348 4Basic anatomy and physiology The eye is a highly specialized organ with an average axial length of 24 mm and a volume of 6.5 ml. Except for its anterior aspect,

More information

The Human Eye and a Camera 12.1

The 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 information

Biology 70 Slides for Lecture 1 Fall 2007

Biology 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 information

1. Introduction to Anatomy of the Eye and its Adnexa

1. Introduction to Anatomy of the Eye and its Adnexa 1. Introduction to Anatomy of the Eye and its Adnexa Fig 1: A Cross section of the human eye. Let us imagine we are traveling with a ray of light into the eye. The first structure we will encounter is

More information

Materials Cow eye, dissecting pan, dissecting kit, safety glasses, lab apron, and gloves

Materials 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 information

10/8/ dpt. n 21 = n n' r D = The electromagnetic spectrum. A few words about light. BÓDIS Emőke 02 October Optical Imaging in the Eye

10/8/ 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 information

Slide 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

Slide 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 information

Exam 3--PHYS 151--S15

Exam 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 information

Vision. The eye. Image formation. Eye defects & corrective lenses. Visual acuity. Colour vision. Lecture 3.5

Vision. 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 information

11/23/11. 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 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 information

By Dr. Abdelaziz Hussein

By Dr. Abdelaziz Hussein By Dr. Abdelaziz Hussein Light is a form of radiant energy, consisting of electromagnetic waves a. Velocity of light: In air it is 300,000 km/second. b. Wave length: The wave-length of visible light to

More information

Class 10 Science NCERT Exemplar Solutions Human Eye and Colourful World

Class 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 information

25 Things To Know. Vision

25 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 information

The Special Senses: Vision

The 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 information

Sheep Eye Dissection

Sheep Eye Dissection Sheep Eye Dissection Question: How do the various parts of the eye function together to make an image appear on the retina? Materials and Equipment: Preserved sheep eye Scissors Dissection tray Tweezers

More information

Eyeball Model Lab Date Block

Eyeball Model Lab Date Block Science 8 Name Eyeball Model Lab Date Block Problem: Identify the twelve key parts of the eye and describe their function. Materials: dissecting scissors ping pong ball transparent plastic ordinary scissors

More information

Visual Optics. Visual Optics - Introduction

Visual 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 information

Sensory receptors External internal stimulus change detectable energy transduce action potential different strengths different frequencies

Sensory 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 information

A&P 1 Eye & Vision Lab Vision Concepts

A&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 information

HSC Biology. Published Feb 9, 2017 HSC BIOLOGY OPTION: COMMUNICATION. By Sahar (99.1 ATAR)

HSC Biology. Published Feb 9, 2017 HSC BIOLOGY OPTION: COMMUNICATION. By Sahar (99.1 ATAR) HSC Biology Year 2014 Mark 92.00 Pages 11 Published Feb 9, 2017 HSC BIOLOGY OPTION: COMMUNICATION By Sahar (99.1 ATAR) Your notes author, Sahar. Sahar achieved an ATAR of 99.1 in 2014 while attending Carlingford

More information

Physics Chapter Review Chapter 25- The Eye and Optical Instruments Ethan Blitstein

Physics Chapter Review Chapter 25- The Eye and Optical Instruments Ethan Blitstein Physics Chapter Review Chapter 25- The Eye and Optical Instruments Ethan Blitstein The Human Eye As light enters through the human eye it first passes through the cornea (a thin transparent membrane of

More information

Chapter Six Chapter Six

Chapter 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 information

The Eye. (We ll leave the Lord Sauron jokes to you.)

The Eye. (We ll leave the Lord Sauron jokes to you.) The Eye (We ll leave the Lord Sauron jokes to you.) When you look in the mirror, you only see a very small part of your eyes. In reality, they are incredibly complex organs with a pretty big job: enabling

More information

sclera pupil What happens to light that enters the eye?

sclera pupil What happens to light that enters the eye? Human Vision Textbook pages 202 215 Before You Read Some people can see things clearly from a great distance. Other people can see things clearly only when they are nearby. Why might this be? Write your

More information

Objectives. 3. Visual acuity. Layers of the. eye ball. 1. Conjunctiva : is. three quarters. posteriorly and

Objectives. 3. Visual acuity. Layers of the. eye ball. 1. Conjunctiva : is. three quarters. posteriorly and OCULAR PHYSIOLOGY (I) Dr.Ahmed Al Shaibani Lab.2 Oct.2013 Objectives 1. Review of ocular anatomy (Ex. after image) 2. Visual pathway & field (Ex. Crossed & uncrossed diplopia, mechanical stimulation of

More information

L. R. & S. M. VISSANJI ACADEMY SECONDARY SECTION PHYSICS-GRADE: VIII OPTICAL INSTRUMENTS

L. R. & S. M. VISSANJI ACADEMY SECONDARY SECTION PHYSICS-GRADE: VIII OPTICAL INSTRUMENTS L. R. & S. M. VISSANJI ACADEMY SECONDARY SECTION - 2016-17 PHYSICS-GRADE: VIII OPTICAL INSTRUMENTS SIMPLE MICROSCOPE A simple microscope consists of a single convex lens of a short focal length. The object

More information

12.1. Human Perception of Light. Perceiving Light

12.1. 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 information

COW 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. 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 information

The eye & corrective lenses

The eye & corrective lenses Phys 102 Lecture 20 The eye & corrective lenses 1 Today we will... Apply concepts from ray optics & lenses Simple optical instruments the camera & the eye Learn about the human eye Accommodation Myopia,

More information

The Human Brain and Senses: Memory

The 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 information

Special Senses: The Eye

Special Senses: The Eye Collin County Community College BIOL 2401: Week 9 Special Senses: The Eye 1 VISION As humans, we rely on Vision more than any other special sense. The eye itself is surrounded by accessory structures Eyelids

More information

The Human Eye Looking at your own eye with an Eye Scope

The 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 information

Photography (cont d)

Photography (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 information

In the following diagram the parts of the eye are visualized and labeled for you.

In the following diagram the parts of the eye are visualized and labeled for you. Investigation 3.12B: The Eye In the preceding case study marker of the problem of greatest concern to you lay in finding the pupils fixed in a dilated position. But what is the pupil and what makes it

More information

Chapter 25: Applied Optics. PHY2054: Chapter 25

Chapter 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 information

Seeing and Perception. External features of the Eye

Seeing 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 information

INTRODUCING OPTICS CONCEPTS TO STUDENTS THROUGH THE OX EYE EXPERIMENT

INTRODUCING OPTICS CONCEPTS TO STUDENTS THROUGH THE OX EYE EXPERIMENT INTRODUCING OPTICS CONCEPTS TO STUDENTS THROUGH THE OX EYE EXPERIMENT Marcela L. Redígolo redigolo@univap.br Leandro P. Alves leandro@univap.br Egberto Munin munin@univap.br IP&D Univap Av. Shishima Hifumi,

More information

[Chapter 2] Ocular Geometry and Topography. Elements of Ocular Structure

[Chapter 2] Ocular Geometry and Topography. Elements of Ocular Structure [Chapter 2] Ocular Geometry and Topography Before Sam Clemens became Mark Twain, he had been, among other things, a riverboat pilot, a placer miner, and a newspaper reporter, occupations in which success

More information

The Human Eye: Structures

The 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 information

Introduction. Strand F Unit 3: Optics. Learning Objectives. Introduction. At the end of this unit you should be able to;

Introduction. Strand F Unit 3: Optics. Learning Objectives. Introduction. At the end of this unit you should be able to; Learning Objectives At the end of this unit you should be able to; Identify converging and diverging lenses from their curvature Construct ray diagrams for converging and diverging lenses in order to locate

More information

Chapter 24 Geometrical Optics. Copyright 2010 Pearson Education, Inc.

Chapter 24 Geometrical Optics. Copyright 2010 Pearson Education, Inc. Chapter 24 Geometrical Optics Lenses convex (converging) concave (diverging) Mirrors Ray Tracing for Mirrors We use three principal rays in finding the image produced by a curved mirror. The parallel ray

More information

11 Human Eye & colourful world IMPORTANT NOTES ANIL TUTORIALS

11 Human Eye & colourful world IMPORTANT NOTES ANIL TUTORIALS 11 Human Eye & colourful world IMPORTANT NOTES 1. Parts of the Human Eye : (i) Sclerotic is the outermost white fibrous covering of the eye. (ii) Cornea is the transparent front bulging portion of the

More information

Material after quiz and still on everyone s Unit 11 test.

Material after quiz and still on everyone s Unit 11 test. Material after quiz and still on everyone s Unit 11 test. When light travels from a fast material like air into a slow material like glass, Snell s Law always works. Material from here on out though is

More information

Science 8 Unit 2 Pack:

Science 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 information

Introduction. Chapter Aim of the Thesis

Introduction. Chapter Aim of the Thesis Chapter 1 Introduction 1.1 Aim of the Thesis The main aim of this investigation was to develop a new instrument for measurement of light reflected from the retina in a living human eye. At the start of

More information

Special Senses. Important Concepts. Anatomy of the Eye. Anatomy of the Eye. Biol 219 Lecture 17 Vision Fall The Eye and Vision

Special Senses. Important Concepts. Anatomy of the Eye. Anatomy of the Eye. Biol 219 Lecture 17 Vision Fall The Eye and Vision Special Senses The Eye and Vision Important Concepts Describe the structures of the eye and the role of each structure in vision. Trace the pathway for vis ion from the retina to the visual cortex. Explain

More information

PSY 214 Lecture # (09/14/2011) (Introduction to Vision) Dr. Achtman PSY 214. Lecture 4 Topic: Introduction to Vision Chapter 3, pages 44-54

PSY 214 Lecture # (09/14/2011) (Introduction to Vision) Dr. Achtman PSY 214. Lecture 4 Topic: Introduction to Vision Chapter 3, pages 44-54 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

More information

Physics of the Eye *

Physics of the Eye * OpenStax-CNX module: m42482 1 Physics of the Eye * OpenStax This work is produced by OpenStax-CNX and licensed under the Creative Commons Attribution License 3.0 Abstract Explain the image formation by

More information

OPTICAL SYSTEMS OBJECTIVES

OPTICAL SYSTEMS OBJECTIVES 101 L7 OPTICAL SYSTEMS OBJECTIVES Aims Your aim here should be to acquire a working knowledge of the basic components of optical systems and understand their purpose, function and limitations in terms

More information

Refraction Phenomena Apparent Depth & Volume

Refraction Phenomena Apparent Depth & Volume Refraction Phenomena Apparent Depth & Volume Refraction can change the perception of depth and volume because the apparent path of light does not equal the actual path of light. 1 Underwater Vision Atmospheric

More information

-eyelashes are richly innervated and triggers reflex blinking

-eyelashes are richly innervated and triggers reflex blinking The Eye and Vision -vision is the dominant sense -70% of all sensory receptors in the body are in the eyes -half of the cerebral cortex is involved in some aspect of visual processing -accessory structures

More information

4. Cut away the fat and muscle.

4. 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 information

III: Vision. Objectives:

III: 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 information

Refraction of Light. Refraction of Light

Refraction 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 information

General Physics - E&M (PHY 1308) - Lecture Notes. General Physics - E&M (PHY 1308) Lecture Notes

General 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 information

The Human Brain and Senses: Memory

The Human Brain and Senses: Memory The Human Brain and Senses: Memory Methods of Learning Methods of Learning Learning The acquisition of new knowledge and skills. There are several types of memory, and each is processed in a different

More information

The Human Eye Nearpoint of vision

The 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 information

Cow Eye Dissection. Online dissection, for kids abstaining:

Cow 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 information

Retinal stray light originating from intraocular lenses and its effect on visual performance van der Mooren, Marie Huibert

Retinal 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 information

LESSON 5 - THE OPTICS OF THE EYE

LESSON 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 information

ensory System III Eye Reflexes

ensory System III Eye Reflexes ensory System III Eye Reflexes Quick Review from Last Week Eye Anatomy Inside of the Eye choroid Eye Reflexes Eye Reflexes A healthy person has a number of eye reflexes: Pupillary light reflex Vestibulo-ocular

More information

Downloaded from

Downloaded from CHAPTER 11-HUMAN EYE AND COLOURFUL WORLD Power of accommodation: Ability of the eye lens to adjust its focal length. Relaxation of ciliary muscles lens becomes thin increase in focal length. Contraction

More information

The Hyman Eye and the Colourful World

The Hyman Eye and the Colourful World The Hyman Eye and the Colourful World In this chapter we will study Human eye that uses the light and enable us to see the objects. We will also use the idea of refraction of light in some optical phenomena

More information

Aspects of Vision. Senses

Aspects 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 information

Model Science The Human Eye

Model Science The Human Eye Model Science The Human Eye LEVEL: Grades 6, 7 and 8 MESA DAY CONTEST RULES 2009-2010 TYPE OF CONTEST: COMPOSITION OF TEAMS: NUMBER OF TEAMS: SPONSOR: Individual / Team 1 2 students per team 3 teams per

More information

12.1. Human Perception of Light. Perceiving Light

12.1. 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 information

EYE: THE PHOTORECEPTOR SYSTEM. Prof. Dr. Huda Al Khateeb

EYE: THE PHOTORECEPTOR SYSTEM. Prof. Dr. Huda Al Khateeb EYE: THE PHOTORECEPTOR SYSTEM Prof. Dr. Huda Al Khateeb Lecture 1 The eye ball Objectives By the end of this lecture the student should: 1. List the layers and chambers of the eye ball 2. Describe the

More information

PHYSICS. Chapter 35 Lecture FOR SCIENTISTS AND ENGINEERS A STRATEGIC APPROACH 4/E RANDALL D. KNIGHT

PHYSICS. 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

Early Visual Processing: Receptive Fields & Retinal Processing (Chapter 2, part 2)

Early 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 information

CHAPTER 11 The Hyman Eye and the Colourful World In this chapter we will study Human eye that uses the light and enable us to see the objects. We will also use the idea of refraction of light in some optical

More information

Chapter 11 Human Eye and Colourful World Question 1: What is meant by power of accommodation of the eye? When the ciliary muscles are relaxed, the eye lens becomes thin, the focal length increases, and

More information

Exemplar for Internal Achievement Standard Level 2

Exemplar for Internal Achievement Standard Level 2 Exemplar for internal assessment resource Physics 2.2A for Achievement Standard 91169 Exemplar for Internal Achievement Standard 91169 Level 2 This exemplar supports assessment against: Achievement Standard

More information

Lab #11 - Nervous System II Senses

Lab #11 - Nervous System II Senses Page1 Nervous System II Lab #11 - Nervous System II Senses Objectives: Dissect a sheep eye and identify the structures Observe a human eye model and identify the structures Observe a human ear model and

More information

Human Eye and Colourful World Science. Intext Exercise 1

Human Eye and Colourful World Science. Intext Exercise 1 Intext Exercise 1 Question 1: What is meant by power of accommodation of the eye? Solution 1: When the ciliary muscles are relaxed, the eye lens becomes thin, the focal length increases, and the distant

More information

INTERNATIONAL TURKISH HOPE SCHOOL ACADEMIC YEAR CHITTAGONG SENIOR SECTION BIOLOGY CO-ORDINATION CLASS 09 and 10 Name :... Date :...

INTERNATIONAL TURKISH HOPE SCHOOL ACADEMIC YEAR CHITTAGONG SENIOR SECTION BIOLOGY CO-ORDINATION CLASS 09 and 10 Name :... Date :... 1 P a g e 2 P a g e 3 P a g e 4 P a g e 5 P a g e 6 P a g e 7 P a g e 8 P a g e 9 P a g e 10 P a g e Name :... Date :... 11 P a g e Name :... Date :... 12 P a g e 13 P a g e 14 P a g e play important role

More information

Lenses- Worksheet. (Use a ray box to answer questions 3 to 7)

Lenses- Worksheet. (Use a ray box to answer questions 3 to 7) Lenses- Worksheet 1. Look at the lenses in front of you and try to distinguish the different types of lenses? Describe each type and record its characteristics. 2. Using the lenses in front of you, look

More information

BLOSSOMS_- What s_in_an_eye?

BLOSSOMS_- 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 information

Visual Perception of Images

Visual 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 information

Lecture 8. Lecture 8. r 1

Lecture 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 information