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.
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Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
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All humans have the ability to see ultraviolet light, but it is passively filtered out by the eye's lens. People who undergo surgery to remove the lens can detect ultraviolet light.
21
In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
130
Tigers can see 6 times better at night than humans.
305
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 colossal squid has the largest eyes in the world.
4