Sheep, goats, octopuses, and toads have rectangular pupils.
7
The human eye blinks an average of 4,200,000 times a year.
233
The colossal squid has the largest eyes in the world.
4
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
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
If the human eye was a digital camera, it would have 576 megapixels.
25