You see them every time you look in a mirror. In fact, you can’t see anything without them. Your eyes are a very important part of your body, but how much do you know about them? Here are some interesting and fun facts about the eye.
Major processing power: Half the human brain is dedicated to vision and seeing.
Get deep: We have depth perception because we have two eyes. This allows us to see how far away objects are from us.
How colorful: Eye color is determined by the amount of melanin in your iris. The most common eye color is brown.
Millions and millions: The eye has more than 2 million moving parts. Eyes contain 7 million cones, which help you see color, as well as 100 million rods, which help you see better in the dark.
What nerve: The optic nerve is too sensitive and complicated to reconstruct, which is why eyes cannot be transplanted. The optic nerve also creates a small blind spot in the back of your eye. You don’t notice because your eyes work together to fill in the other’s blind spot.
Don’t lash out: Eyelashes keep dirt out of our eyes. Eyelashes last about five months before falling out. If you lined up all the eyelashes shed in a lifetime, they would measure 98 feet long.
Moving fast: The average blink takes 1/3 of a second. You can blink up to five times a second. You blink about 15-20 times in a minute.
Seeing red: Red eye in photos is caused by the light from the camera’s flash bouncing off the capillaries in your eye.
A dry start: Even though they cry, newborns don’t shed tears. They don’t start producing tears until they are about six weeks old.
Why doctors matter: Worldwide, about 234 million people have some sort of vision impairment.