Binocular Vision

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The combined vision of two eyes (binocular vision). Stereopsis is one of the ways depth is perceived by the human brain. Other methods include the larger size of close objects and smaller size of distant objects even with one eye (monocular vision). The term comes from "stereo," which means "solid" and "3-dimensional" plus "opsis," meaning sight. See 3D visualization and stereoscopic 3D.
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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Binocular Vision


vision with two eyes. In binocular vision, the visual axes of the eyes are arranged in such a manner that the images of the object viewed strike the identical portions of the retinas of both eyes. This produces a single stereoscopic image—a view of the world in relief. Binocular vision also makes it possible to determine visually the relative location of objects in space and to judge their distance from each other. When looking with one eye—that is, with monocular vision—the distance of objects can likewise be judged, but not as accurately as with binocular vision.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.