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| simple experience associated with a stimulus; meaningless (raw data) |
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| how a sensation is interpretted; meaningful (processed data) |
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1. physical stimulus impinges upon organism
2. physiological response to physical stimulus
3. sensory experience |
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| thin film that covers and protects the eye; also focuses most light |
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| hole in the eye that lets light in |
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| muscle that has ability to make pupil bigger or smaller; provides eye color |
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| focuses light more; changes shape to adjust to focal length; hardens with age |
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| photographic film of the eye; detects light and transmits info about light to the brain |
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| light sensitive cells that cause transduction (conversion of physical energy into a nueral signal); 2 types- rods and cones |
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part of photorecptor; extremely sensitive to light because of rhodopsin (their photochemical)
have poor visual acuity (ability to discriminate fine patterns) because of greater nueral convergence |
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type of photoreceptor; photochemical is much less sensitive to light; 3 kinds of photochemicals which are responsible for color vision
has good visual acuity because of less nueral convergence |
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| path of light from the eye to the brain |
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| light is initially focused through the lens, enters the eye through the pupil (whose size is controlled by the iris), and is again focused by the lense. From here light travels to the retina, where it hits photoreceptors (either rods or cones, depending on brightness of light). Light causes the photochemicals in these photoreptors to "break," and this physical change is converted into a nueral signal. This nueral signal is transmitted through bipolar cells to the retinal ganglion cells, whoses axons form the optical nerve. The optical nerve forms synapses in the thalamus, which then sends the signal to the visual cortex (occipital lobe), which creates the sensory experience |
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