1. The average blink lasts for about 1/10th of a second.
2. Seeing requires about half of the brain to get involved.
3. Newborn babies don’t produce tears until they are about 4-11 weeks old.
4. There are about 39 million blind people in the world.
5. You blink about 12 times every minute.
6. The muscles that control your eyes are the most active in the body.
7. People with blue eyes all share a common ancestor.
8. Your eyes actually see everything upside down, but your brain sorts it out.
9. The human eye can detect over 10 million different colors.
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