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
Tigers can see 6 times better at night than humans.
305
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
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
In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
130
The colossal squid has the largest eyes in the world.
4
Poor eyesight (myopia) is associated with higher IQ.
232
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