Animal vision varies among the species.
Most animals don t see as well as do humans.
Except for birds and primates, such as monkeys, the animal eye is not as well developed as the human eye. For most animals, the clear cornea, or window of the eye, is not as curved as in people. This results in astigmatism and distorted images. The lens is larger and unable to change its shape as well as in humans. Thus, accommodation , or focusing, is also poorer in most animals.