The two eyes working together enable us to perceive depth which is not possible to do with only one eye. Our two eyes view an object from approximately the same height but they see the object from slightly different horizontal angles. When processed by the brain these two slightly different images gives rise to perception of depth and make the object appear in three dimensions. This ability, called stereoscopic vision, also allows us to judge distances, to estimate how far an object is, which is essential to enable us to go about in our daily chores.
