Flashcard Set Preview
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cornea
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light entrs throught here. a transparetn covering on the eye's surface.
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iris
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muscle that contracts or expands to determine the amt. of light that enters. gives color to...
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pupil
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the black opening in iris. the brighter the light the smaller the pupil. vice versa
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accomodation
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process where lens changes shape to adj. distance of object, which helps focus the visual...
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retina
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thin sheet of neural tissue in the inner surface of eye. where image is projected
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photoreceotors (2 kinds)
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specialized receptor cells that are sensitive to light.
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rods and cones do what?
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they convert physcial energy of light into neural signals that the brain processes to create...
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cones
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responsible for color vision, less sensitive to light
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rods
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allow us to detect objects(shape) in low light. sensitive to intensity of light not color....
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bipolar cells
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layer of cells interconnecting photoreceptors to ganglion cells
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optic nerve
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made up of a million ganglion axons transmits visual info to brain.
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blind spot
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part where optic nerve leaves retina
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fovea
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part of the retina that corresponds to the center of our gaze and that gives rise to our sharpest...
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feauture detectors
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neurons that respond to specific features of the visual stimulus
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young-hemholtz theory or trichromatic theory
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says color vision exist from the ability to see diff't colors depends on the relative activity...
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opponent procecess theory by eward hering
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says that the exp. of color results frm opposing processes involving 3 pairs of color receptors...
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monochromats
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people who only see in black and white
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dichromats
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people who lack one of the three types of cones.
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how do the eyes process light?
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lgt enters the eye through the cornea and passes througth the pupil and then the lens, which...
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how do the eyes process light cont'd
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the light then stimulates photoreceptor cells
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