Sheep, goats, octopuses, and toads have rectangular pupils.
7
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
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
The colossal squid has the largest eyes in the world.
4
The human eye blinks an average of 4,200,000 times a year.
233
If the human eye was a digital camera, it would have 576 megapixels.
25
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
Poor eyesight (myopia) is associated with higher IQ.
232