(1) (zoology) A type of vision wherein both eyes of an animal are used at the same time (as opposed to monocular vision in which the eyes are used separately)
(2) A condition wherein both eyes of an animal are capable of visual perception
In zoology, most predatory animals employ binocular vision. Morphologically, these animals have eyes situated in front; hence, they directly see what is ahead. Each eye sees a separate image, which then combines into one composite image. This type of vision also enables better depth perception. It makes animals see in 3D mode. Thus, these animals are better at perceiving relative distances and depth. Examples of animals using binocular vision are eagles, humans, and snakes.
Word origin: Latin bini (double) + oculus (eye)