binocular vision Vision that results from the ability of an animal to view an object using both eyes simultaneously, and which probably enables the animal to judge distances. In those Mammalia and Aves which possess binocular vision, the orbits are directed forward. In some arboreal Serpentes, in which the orbits are directed laterally, binocular vision may result from the possession of eyes whose pupils are long, horizontal slits located eccentrically and close to the anterior margins of the orbits.

binocular vision Vision that results from the ability of an animal to view an object using both eyes simultaneously, and which probably enables the animal to judge distances. In those mammals and birds which possess binocular vision, the orbits are directed forward. In some arboreal snakes, in which the orbits are directed laterally, binocular vision may result from the possession of eyes whose pupils are long, horizontal slits located eccentrically and close to the anterior margins of the orbits.

binocular vision The ability, found only in animals with forward-facing eyes, to produce a focused image of the same object simultaneously on the retinas of both eyes. This permits three-dimensional vision and contributes to distance judgment.