optogram

n. the physical image produced on the retina by the bleaching of rhodopsin by a visual stimulus (see pigment bleaching). In the 19th century, optograms were obtained by rapidly removing the retina of experimental animals after they had viewed a bright stationary stimulus and, in several instances, by examining the retinas of human prisoners immediately after execution.

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Psychology term of the day

January 11th 2025

induced color

a color change in a visual field resulting from stimulation of a neighboring area, rather than from stimulation of the part of the field in which the change appears.