Only about 2% of the world population has green eyes.
36
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
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Most of us have microscopic, worm like mites named Demodex that live in our eyelashes and have claws and a mouth.
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The colossal squid has the largest eyes in the world.
4
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