There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
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Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
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
The human eye blinks an average of 4,200,000 times a year.
233
In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
130
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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