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
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
Only about 2% of the world population has green eyes.
36
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
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