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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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
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
Poor eyesight (myopia) is associated with higher IQ.
232
Sheep, goats, octopuses, and toads have rectangular pupils.
7