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.
We have depth perception because we have two eyes. This allows us to see how far away objects are from us.
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.
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.
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.
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.
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