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17 Cards in this Set
- Front
- Back
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optic nerve
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the thick nerve that exits from the back of the eye and carries visual information to the visual cortex in the brain p. 97
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optic disk
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area of the retina without rods or cones, where the optic nerve exits the back of the eye p. 96the
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ganglion cells
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in the retina, the specialized nuerons that connect to the bipolar cells; the bundled axons of the ganglion cells form the optic nerve p. 96
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blind spot
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the point at which the optic nerve leaves the eye, producing a small gap in the feild of vision p.96
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bipolar cells
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in the retina specialized nuerons that connect the rods and cones with the ganglion cells. p 96
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Rods
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the long thin blunt sensory of the eyes that are highly sensitive to light but not color and that are primarily responsible for periphial vision and night vision p.95
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retina
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a thin light sensitive membrane located at the back of the eye that contains the sensory receptors for vision. p.95
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fovea
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a small area in the center of the retina composed entirely of cones, where visual information is most sharply focused p. 95
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cones
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the short thick pointed sensory receptorsof the eye that direct color,and responsible for color vision and visual acuity p 95
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pupil
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the opening in the middle of the iris that changes sizes to let in different amounts of light. p. 94
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lens
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a transparent structure located behind the pupil that actively focuses, or bends, light as it enters the eye p.94
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iris
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the coloredpart of the eye, which is the muscle that control the size of the pupil. p. 94
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cornea
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a clear membrane covering the visible part of the eye that helps gather and direct light p. 94
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accommodation
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The process which the lens changes shape to focus incoming light so that it falls on the retina p.94
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wavelength
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the distance from one wave peak to another. p.94
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Weber's Law
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a principle of sensation that holds that the size of the just noticeable will vary depending on the relation to the strength of the original stimulus p.92
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sensory adaption
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the decline in sensitivy to a constant stimulus p. 92
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