Term
| What basic process underlie the sense of vision? |
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Definition
| Vision starts with light the physical energy that stimulates the eye |
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Term
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Definition
| The part of the eye that converts the electromagnetic energy of light to electrical impulse for transmission to the brain |
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Definition
| Cylinderical receptor cells in the retina that are highly sensitive to light. They play a key role in pripheral vision and night vision |
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Definition
| Cone-shaped, light-sensitive receptor cellOpponeent s in the retina that are responsible for sharp focus and color perception, particulary in bright light. |
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Definition
| the activation of neurons in the cortex by visual stimuli of specific shapes or patterns |
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Term
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Definition
| This theory suggests that there are three kinds of cones in the rtina, each of which responds primarily to a specific range of wavelenghts. One is more responsive to blue-violet colors, one to green and the thrid to yellow-red. according to the theory perception of color is influenced by the relative strenght with which each of the three kinds of cones is activated. EX.(So if we see a blue sky the blue-violet cones are primarily triggered and the others show less activity). |
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Term
| Opponent-process theory of color |
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Definition
| this theory suggest that receptor cells for color are linked in pairs working in opposition to each other. EX.(Specifically, there is a blue-yellow pairing, a red-green pairing, and a black-white pairing. If an object reflects light that contains more blue than yellow it will stimulate the firing of the cells sensitive to blue and simultaneously discouraging or inhibiting the firing receptor cells sensitive to yellow and so on). |
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Term
| passage way for light to enter the eye |
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Definition
| cornea, pupil,the lens,and ultimately the retina. |
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