The human eye blinks an average of 4,200,000 times a year.
233
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
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
Sheep, goats, octopuses, and toads have rectangular pupils.
7
Poor eyesight (myopia) is associated with higher IQ.
232
The colossal squid has the largest eyes in the world.
4