There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
21
Sheep, goats, octopuses, and toads have rectangular pupils.
7
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
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
In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
130
Only about 2% of the world population has green eyes.
36