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Most people rely on their eyes to see and make sense of the world around them. If you’re reading this, your eyes are hard at work. You use your eyes for countless other things, too, like doing homework, playing sports, looking for that favorite shirt, or watching out for the neighborhood’s angry dog. That’s why it’s important to take care of your eyes.

Here you can learn about your eyes, how they work, and how to keep them healthy. Plus, you’ll discover lots of fun eye facts.
Ask a Scientist
Watch now! NEI scientists explain animal eyes, what your eyes do while you sleep, and more.
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Find out how you can keep your eyes healthy with these tips.
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How Many Fish Do You See?
Trick your brain with these optical illusions.
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From Light to Sight
Ever wonder how you’re able to see? Find out with this video.
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Last updated: June 26, 2019