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Color Blindness
A visual impairment where one is unable to distinguish between certain colors, often resulting from a deficiency or absence of color-sensitive photoreceptor cells in the eye.
Trichromatic Theory
A theory of color vision that proposes three types of color receptors in the eye, each sensitive to red, green, or blue.
Opponent-Process Theory
Theory stating that cells in the visual system respond to complementary pairs of red-green and blue-yellow colors; agiven cell might be excited by red and inhibited by green, whereas another cell might be excited by yellow and inhibited by blue
Afterimages
Visual illusions in which retinal impressions persist after the removal of a stimulus, often in complementary colors.
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