Tigers can see 6 times better at night than humans.
305
Those things you see in your eyes when you stare into space are called Mouches Voltanes, which are also broadly referenced to as Floaters.
9
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Sheep, goats, octopuses, and toads have rectangular pupils.
7
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
All humans have the ability to see ultraviolet light, but it is passively filtered out by the eye's lens. People who undergo surgery to remove the lens can detect ultraviolet light.
21
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22