The human eye blinks an average of 4,200,000 times a year.
233
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
Sheep, goats, octopuses, and toads have rectangular pupils.
7
Tigers can see 6 times better at night than humans.
305
If the human eye was a digital camera, it would have 576 megapixels.
25
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 focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
21
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132