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.
22
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
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
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
Our eyes are always the same size from birth, but our nose and ears never stop growing.
269
In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
130