Stereopsis

Common card · No. 205596

Stereopsis is the visual perception that seen objects have physical extent in three dimensions of space. It is caused by pictorial and nonpictorial depth cues. The largest component of stereopsis is stereopsis from binocular disparity, which is enabled through binocular vision. This sensation is much stronger than the suggestion of depth that is created by two-dimensional perspective. Stereopsis shares visual causes with depth perception. In humans, at least two mechanisms produce the sensation of stereopsis: binocular depth vision and (monocular) motion vision. In binocular depth vision, the sensation arises from processing differences in retinal images resulting from the two eyes looking from different, but similar, directions (binocular disparity). In motion vision, the sensation arises from processing motion information when the observer moves (e.g. optical flow, parallax). The sensation of stereopsis is similar in both cases. In research on depth vision, the term stereopsis is primarily...

Read on Wikipedia · Image B.W. Kilburn, Public domain