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27 Cards in this Set
- Front
- Back
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Cornea
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Protects the eye and provides focus.."window"
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Pupil
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small, adjustable opening in iris
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Lens
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Behind pupil that focuses light rays into an image
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Iris
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Surrounds the pupil, colored ring of muscle that controls light level
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What happens to pupils when lights dim?
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DILATE
for more light and image is less sharp. |
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What happens to pupils when lightsget brighter?
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CONSTRICT
for less light and image is sharper. |
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Retina
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tissue that absorbs light and processes information
focuses light rays by accommodation |
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Accomodation
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adjust focus
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Farsightedness
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distant images are clear
close images are blurry |
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Nearsightedness
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close images are clear
distand images are blurry |
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Light Adapation
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eyes become LESS sensitive to light in high illumination (leaving a movie theatre)
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Dark Adapation
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eyes become MORE sensitive to light in low illumination (entering a movie theatre)
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Cones
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DAYLIGHT VISION
cluster around fovea |
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Rods
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NIGHTTIME VISION
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Fovea
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Central focal point where cone's cluster
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Optic Nerve
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connects eye to brain and carries info
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Optic Disk
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hole in retina where optic nerve fibers leave eye
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Blind Spot
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When optic nerve leaves eye
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Tri-chromatic (Young Helmholtz) Theory
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Three Receptors: Red Green Blue
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Opponent-Process Theory
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Receptors antagonistic responses
(red-green) (yellow-blue) (black-white) |
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Color Blindness
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inablility to distinguish CERTAIN colors
-inherited trait -red-green |
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Convergence
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movements of muscles
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Gestalt Principles
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organized whole; tendancy to integrate pieces of information into meaningful wholes.
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Monocular
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Depth cues available to either eye alone
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Binocular
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difference in images seen by two eyes used to calculate distance and depth
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Depth Perception
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see 3D even though they are 2D images
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Perceptual Consistancy
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brain view as consistant image
(door is rectangle) |
