Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Only about 2% of the world population has green eyes.
36
In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
130
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
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
Most of us have microscopic, worm like mites named Demodex that live in our eyelashes and have claws and a mouth.
-137
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
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