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.
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Only about 2% of the world population has green eyes.
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The human eye blinks an average of 4,200,000 times a year.
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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.
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Most of us have microscopic, worm like mites named Demodex that live in our eyelashes and have claws and a mouth.
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Our eyes are always the same size from birth, but our nose and ears never stop growing.
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Those things you see in your eyes when you stare into space are called Mouches Voltanes, which are also broadly referenced to as Floaters.
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