Sheep, goats, octopuses, and toads have rectangular pupils.
7
There's a woman named Veronica Seider who had vision 20x better than average. She could identify people more than a mile (1.6km) away.
22
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.
22
Our eyes are always the same size from birth, but our nose and ears never stop growing.
269
Only about 2% of the world population has green eyes.
36
The colossal squid has the largest eyes in the world.
4
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
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75