The human eye blinks an average of 4,200,000 times a year.
233
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
Tigers can see 6 times better at night than humans.
305
Poor eyesight (myopia) is associated with higher IQ.
232
The colossal squid has the largest eyes in the world.
4
If the human eye was a digital camera, it would have 576 megapixels.
25
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