Sheep, goats, octopuses, and toads have rectangular pupils.
7
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
If the human eye was a digital camera, it would have 576 megapixels.
25
Only about 2% of the world population has green eyes.
36
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266