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Tag: Fascinating

10 Fascinating Facts About Your Eyes and Vision

October 9, 2020
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| Health Facts



Close up of the side of a woman's face and her eye.


Getty Images

1. Most people can see a million colors

Scientists estimate that the average person can see at least a million colors thanks to the eye’s cone cells, which send signals to the brain that allow us to perceive different hues. If that sounds impressive, consider that people with a rare condition called tetrachromacy have an extra type of cone cell and can see as many as 100 million colors as a result!

2. You spend 10 percent of your waking hours blinking

Blinking keeps your eyes lubricated and protects them from dust and debris, which may help explain why we do so much of it: The average person blinks between 15 and 20 times per minute, or 14,400 to 19,200 times a day — that’s about 10 percent of your waking life, or upwards of 5 million times in a year.

3. The quick-healing cornea has no blood

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