stereopsis (redirected from third-degree fusion)

Stereopsis

The visual perception of depth, or the ability to see three-dimensionally. For this to occur, the person must be binocular.

Mentioned in: Vision Training

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stereopsis.

See depth perception.

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stereopsis 

Awareness of the relative distances of objects from the observer, by means of binocular vision only and based on retinal disparity. Syn. stereoscopic vision; third-degree fusion. See stereoscopic visual acuity; anaglyph; angle of stereopsis; cortical column; retinal disparity; depth perception; leaf room; stereo-blindness; random-dot stereogram; stereoscopy; Howard-Dolman test; three needle test; two-dimensional test.