Distribution of human cone photoreceptors revealed by computer reconstruction of a whole mounted retina. Black oval represents optic disk in nasal retina. Warm colors indicate high cone density, and cool colors low cone density. Foveal density (white) is so high it is off scale. Isodensity contours are elongated horizontally and shifted nasally in peripheral retina. See page 579. [Computer graphics and photography by Kenneth R. Sloan, Jr., University of Washington, Seattle, WA 98195]

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