Abstract

Some of the fundamental facts of stereoscopic depth perception are described briefly. Emphasis is placed on experiments that provide evidence for a physiologic basis for the phenomenon: existence of limiting disparities, relationship to double images, role of simultaneous stimuli, the limiting delay between stimuli to the two eyes, role of vertical disparities, effect of unequal luminances, the role of training and of strabismus surgery, etc. A general though brief discussion of the theories of stereoscopic depth perception deals with psychologic cues, fixation eye movements, fusional eye movements, Hering theory of local signs, gestalt point of view, and suppression theories. A few current problems are then considered: duration of stimuli, role of eye movements, effect of binocular rivalry, relationship of perceived depth to angular disparity, adaptation to conflicting empiric cues and stereoscopic depth, and the induced effect.

© 1967 Optical Society of America

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