Binocular vision is a mode of vision in which both eyes are used simultaneously. The word binocular comes from Latin: bini for “double” and oculus for “eyes”. Seeing with two eyes confers at least four advantages over having one.
It leaves the subject the possibility of keeping the view even in case of loss of an eye.
It gives a wider field of vision. For example, humans have a maximum horizontal field of view of about 180 degrees with both eyes, each eye having a field of about 150 degrees (90 ° temporal and 60 ° nasal) allowing have a binocular field of view of 120 ° flanked by two monocular fields of about 40 degrees.
It gives a binocular summation increasing the ability to detect weakly luminous objects.
It allows a stereoscopic vision allowing a precise appreciation of the distances. Indeed, the binocular vision is normally accompanied by the brain’s fusion of the two images perceived by the eyes in one but which makes it possible to be aware of the distances