Types of visions in animals
Monocular or periscopic
Laterally placed eyes (frog and reptiles) viewing the object independently due to wide visual angle between optic axis and mid line of the eye.
Binocular vision
Anterio laterally placed eyes (primates, carnivores, birds), both the eyes view the same object simultaneously, overlap of field of vision due to parallel optic axis and mid line of the eye.
Stereo vision
Anteriorly placed eyes (cats) Dissimilarity in viewing the object by left and right eyes, three dimensional view due to very small angle between optic axis and mid line of the eye, fusion of the image by the visual centre.