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Depth perception based on binocular disparity, resulting from the slightly different viewpoints of the side-by-side eyes of humans, monkeys, and some other species, discovered in 1838 by the English physicist and inventor Sir Charles Wheatstone (1802–75). It is served by the magnocellular system, which is colour-blind (see isoluminant). The visual cortex contains disparity-selective cells that respond only to particular binocular disparities and are thus tuned to respond to stimuli at particular distances. Also called stereoscopic vision. See also anaglyph, binocular parallax, horopter, Panum's fusion area, Panum's limiting case, random-dot stereogram, reduction screen, stereoblindness, stereoscope, stereoscopic acuity. [From Greek stereos solid + opsis sight, from ops and eye]

Subjects: Psychology.

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