stereopsis

(redirected from third-degree fusion)
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ster·e·o·scop·ic vis·ion

the single perception of a slightly different image from each eye.
Synonym(s): stereopsis
Farlex Partner Medical Dictionary © Farlex 2012

binocular vision

The visual perception of a fused single image from 2 eyes viewing the same object from slightly different vantages. Binocular vision results from the convergence of neural signals from the corresponding points on the 2 retinas on the same binocular cell in the primary visual cortex. If the images received from each eye differ widely in shape, orientation or luminant contrast, the images then rival each other rather than fuse.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

ster·e·op·sis

(ster'ē-op'sis)
Depth perception (three-dimensional vision) provided by fusion of binocular images.
See also: depth perception
Synonym(s): three-dimensional vision.
[stereo- + G. opsis, vision]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

stereopsis

The normal ability to perceive objects as being solid. Stereoscopic vision.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

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
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.

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.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann