Vision: Light & The Eye (Sample Lecture Slides)
-
Upload
brianspiering -
Category
Education
-
view
597 -
download
3
description
Transcript of Vision: Light & The Eye (Sample Lecture Slides)
![Page 1: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/1.jpg)
VISION:LIGHT & THE EYE
![Page 2: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/2.jpg)
Preparation before attending class:Read: http://www.amazon.com/Foundations-Sensation-Perception-Second-Edition/dp/1841696994, pages 159-183
Watch:http://www.youtube.com/watch?v=Lg73u1B61rMhttp://ed.ted.com/lessons/how-do-we-see-color-colm-kelleher
Check out:http://serendip.brynmawr.edu/bb/blindspot1.html
![Page 3: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/3.jpg)
VISION:LIGHT & THE EYE
(I play “Long As I Can See The Light” by Creedence Clearwater Revival as students enter to set the mood)
![Page 4: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/4.jpg)
Agenda
Review Neuroscience 101 lecture
Light
The Eye
![Page 5: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/5.jpg)
REVIEW!(This is done via the clicker system, http://clickers.umd.edu/)
![Page 6: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/6.jpg)
The _______ lobe is circled.A. occipitalB. parietalC. temporalD. frontal
![Page 7: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/7.jpg)
The circled part(s) is(are):A. SomaB. DendritesC. AxonD. Axon terminals
![Page 8: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/8.jpg)
The human brain has ______ connections than cells:
A. 2x moreB. 10x moreC. 100x more D. 1000x more
![Page 9: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/9.jpg)
LIGHT
![Page 10: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/10.jpg)
WHAT IS LIGHT?
![Page 11: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/11.jpg)
A BRIEF HISTORY OF LIGHT
![Page 12: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/12.jpg)
Newton
![Page 13: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/13.jpg)
Huygens
![Page 14: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/14.jpg)
Young
![Page 15: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/15.jpg)
Maxwell
![Page 16: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/16.jpg)
Planck
![Page 17: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/17.jpg)
Einstein
![Page 18: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/18.jpg)
3 Theories of Light
Rays
Waves
Particles
![Page 19: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/19.jpg)
Rays
Light travels in straight lines at high speed
Useful to understand lens & images
![Page 20: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/20.jpg)
Waves
Light is a wave vibrating at a specific frequency
Useful in understanding color perception
![Page 21: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/21.jpg)
Particles
Light is discrete packets of energy (photons)
Useful low light levels because they can be counted individually
![Page 22: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/22.jpg)
The visible spectrum is a limited (small) part of electromagnetic radiation
![Page 23: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/23.jpg)
InfraredUltraviolet
![Page 24: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/24.jpg)
Important Properties of Light
![Page 25: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/25.jpg)
Reflection
Light rays are scattered backward
at surface
Why is this important for vision?This is how we see objects.
![Page 26: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/26.jpg)
Transmission
Light quanta of certain wavelengths are scattered by the
molecules they hit
Why is this important for vision?This is how our eyes focus.
![Page 27: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/27.jpg)
Absorption
Light quanta are taken up by a substance
converted to other types of energy
Why is this important for vision?This is how we convert light into neural signals
![Page 28: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/28.jpg)
What is luminance?
A photometric measure of the energy
Measured in candelas per square meter of surface
![Page 29: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/29.jpg)
Luminance
![Page 30: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/30.jpg)
Summary
Physics of light
Important properties of light
Luminance
![Page 31: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/31.jpg)
?
![Page 32: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/32.jpg)
THE EYE
![Page 33: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/33.jpg)
Overview
Structure
Optical properties
![Page 34: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/34.jpg)
Overview of the Eye
![Page 35: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/35.jpg)
The Eye
![Page 36: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/36.jpg)
The Cornea
The transparent membrane which allows light to enter and starts the process of focusing
![Page 37: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/37.jpg)
The Iris
Responsible for controlling the diameter of the pupils and thus the amount of light reaching the retina
![Page 38: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/38.jpg)
The Pupil
The circular aperture through which light passes. Dilates and contracts to vary light levels in the eye.
![Page 39: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/39.jpg)
The Lens
Transparent, biconvex structure which helps the focusing process
![Page 40: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/40.jpg)
The Retina
A light-sensitive tissue lining the inner surface of the eyeTranduces light energy into neural signals
![Page 41: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/41.jpg)
The Fovea
The center of region of the retina
![Page 42: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/42.jpg)
Image Size on the Retina
![Page 43: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/43.jpg)
Focusing Images on the Retina
80% Cornea, fixed
20% Lens, variable
![Page 44: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/44.jpg)
Accommodation
The process by which the lens adjusts shape to focus light from objects on the retina.
![Page 45: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/45.jpg)
AccommodationIn a relaxed eye, parallel
rays from a distant object fall into focus on the retina.
Diverging rays from a nearer object will fall into focus behind the retina.
In this case, muscles in the eye change the shape of the lens to maintain focus on the retina.
![Page 46: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/46.jpg)
(I play a part of video which reinforces how the structure of the eye supports the function of the eye)
![Page 47: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/47.jpg)
Why do the eyes move?
Lots of reasons ...
Spatial resolution
Binocular registration
![Page 48: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/48.jpg)
Spatial Resolution
Eye movements maintain the center of attention on the most acute part of the eye, the fovea.
![Page 49: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/49.jpg)
Binocular Registration
Since the eyes are a short distance apart in the head, they have to make vergence movements to maintain binocular fixation
Useful in depth perception
![Page 50: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/50.jpg)
Summary
The structure of the eye supports the function of the eye.
Eye movements serve to maintain high resolution and binocular fixation.
![Page 51: Vision: Light & The Eye (Sample Lecture Slides)](https://reader033.fdocuments.us/reader033/viewer/2022060108/554ec3b9b4c905064d8b4a20/html5/thumbnails/51.jpg)
?