The human eye blinks an average of 4,200,000 times a year.
233
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
Poor eyesight (myopia) is associated with higher IQ.
232
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
The colossal squid has the largest eyes in the world.
4