CBSE Class 10 Answered

Though far point of human eye is infinity, we have limited field of view. The field of view (also field of vision) is the angular extent of the observable world that is seen at any given moment.

The range of visual abilities is not uniform across a field of view, and varies from animal to animal. For example, binocular vision, which is important for depth perception, only covers 140 degrees of the field of vision in humans; the remaining peripheral 40 degrees have no binocular vision (because of the lack of overlap in the images from either eye for those parts of the field of view).