When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
If the human eye was a digital camera, it would have 576 megapixels.
25
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
Poor eyesight (myopia) is associated with higher IQ.
232
Sheep, goats, octopuses, and toads have rectangular pupils.
7
The human eye blinks an average of 4,200,000 times a year.
233
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