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23 Cards in this Set
- Front
- Back
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Hue |
dimension of color determined by wavelength |
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Intensity |
Amount of energy in a wave determined by amplitude brightness |
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Pupil |
adjustable opening in center of the eye |
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Iris |
a ring of muscle that forms the colored portion of the eye controls pupil size |
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Lens |
transparent structure behind pupil focuses images on retina |
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Accomodation |
the process by which a lens changes shape to focus |
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Retina |
light sensitive inner surface of the eye, containing rods and cones |
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rods |
120 million peripheral retina detect black, grey, white twilight and low light |
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Cones |
6 million near center of retina fine detail and color vision Daylight and well-lit conditions |
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Optic Nerve |
nerve that carries neural impulses from eye --> brain |
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fovea |
central point in the retina, around which cones cluster |
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blind spot |
where optic nerve leaves the eye area with no receptors |
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Saccades |
quick eye movements stabilize retinal imaging |
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visual transduction |
transmits light into neural signals |
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Rhodopsin |
pigment found in rods responds to light activity is inhibited by light |
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retina-geniculate-striate pathway |
90% of axons info from left field of vision projects into right
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Retinotopic Organization |
more cortex is devotged to areas of higher acuity |
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M & P Channels |
Magnocellular Layers Parvocellular Layers |
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Magnocellular |
big cell bodies bottom 2 layers of LGN Responsive to movement more input from rods |
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Parvocellular |
Small cell bodies Top 4 layers of LGN Responsive to still / slow objects More inout from cones |
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Receptive Field |
area where stimuli can influence neural firing |
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Trichromatic Theory |
3 types of receptors, each with different spectral sensitivity |
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Opponent Process Theory |
2 different classes of cells encoding color and another encoding brightness |
