The fossil record tells us nothing about how sightless animals first came to see the world. This mystery flustered Charles Darwin. “To suppose that the eye, with all its inimitable contrivances ...

From eyes the size of a dinner plate to 360-degree vision, these animals boast extraordinarily efficient ways of seeing. Meet the creatures with the most crafty ...

Some animals accomplish this with a retractable eye flap. Others rely on their pupils. The circular pupil, because of the way the muscle bunches as it contracts, is the least efficient at closing ...

Using consultation from the All Eye Animal Clinic, The Animal Eye Insitiute, and Penn Vet, he demonstrated that while cats have much better vision at night, they have difficulty seeing as many ...