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Definition
| physiological: how nervous system deals with info,meaningless |
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| psychological, meaningful |
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Definition
1. physical stimulus impinges on organism 2. Physiological response to physical stimulus 3. sensory experience |
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| physical stimulus for vision |
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Definition
visible light! -electromagnetic radiation with wavelengths between 400nm-700nm, different wavelengths, different colors |
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Definition
| cornea, pupil, iris, lens, retina |
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Definition
thin film that covers and protects eye also focuses light (most of focusing) |
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Definition
| hole in your eye that lets light in |
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Definition
muscle that makes the pupil bigger or smaller, gives eye its color |
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Definition
| focuses light more, changes shape to adjust focal length, with age lens hardens |
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Definition
photographic film of your eye function: detect light, and then send info to brain about light |
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Term
| photoceptors, cause what? |
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Definition
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Definition
| conversion of physical energy into neural signal |
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Definition
| rods (permit vision in diml light), cones (permits sharply focused color vision in bright light) |
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Definition
| molecule that changtes its geometry in response to light energy |
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Term
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Definition
| due to the absence of receptor cells, no photoreceptors on optic disc, on 2 pts of visual field |
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Term
| why called rods? photochemical? sensitivity to light? visual acuity? |
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Definition
because of vylindrical shape, ability to see in very dim light rhodopsin so sensitive to light they get saturated at hgiher light levels have poor visual acuity--> greater neural convergence |
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Term
| why called cones? photochemical? saturated? # of kinds? responsible for what? neural convergence? |
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Definition
| because of shape called cones, photochemical much less sensitive to lgiht, don't get saturated in bright light, 3 kinds, responsible for color vision, have good visual acuity, less neural convergence |
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Term
| fovea, rods or cones here? |
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Definition
| center of retina, where light hits coming from object you're looking at/being fixated, only concentrated cones here, |
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Term
| periphery, rods or cones here? |
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Definition
| retina outside fovea, stuff outside focus point that is blurry/unseen because where light is hitting there are no cones receiving it in your eye, rods evenly here, no cones |
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Term
| color vision, dimensional (physically v. psychologically?) |
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Definition
| physically color is unidimensional, psychologically its multidimensional |
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Term
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Definition
three primaries law: the color sensed from any single wavelength can always be matched by mixing together three other different wavelengths |
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