Tigers can see 6 times better at night than humans.
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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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The colossal squid has the largest eyes in the world.
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In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
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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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There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
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When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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