EYE

Although small in size, the eye is an extremely complex organ that captures light and transforms it into impulses that the brain can interpret as images. Discover the different muscles, parts and conditions of the eye.
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At night, why does it take my eyes several minutes to get used to darkness?

At night, your eyes adjust to darkness after several minutes. Do you know why it takes that long? Take a look at how your eyes adjust to darkness.

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  • 10 Crazy Things Contacts Can Do

    10 Crazy Things Contacts Can Do

    Contact lenses have been correcting vision for more than a century, but lenses today can make you look like a cat, monitor your blood sugar and maybe even make you a better athlete. See more »

  • Are carrots really good for your eyesight?

    Are carrots really good for your eyesight?

    It's another one of those things your parents told you to persuade you to eat vegetables. But besides turning orange, if you ate a bunch of carrots, would you develop superhuman vision? See more »

  • At night, why does it take my eyes several minutes to get used to darkness?

    At night, why does it take my eyes several minutes to get used to darkness?

    At night, your eyes adjust to darkness after several minutes. Do you know why it takes that long? Take a look at how your eyes adjust to darkness. See more »

  • Does reading in dim light really hurt your eyes?

    Does reading in dim light really hurt your eyes?

    When bedtime comes far too early, a child may be tempted to read under their covers by flashlight. Parents say the habit will ruin your eyes -- but is this old admonition true or false? See more »

  • Glaucoma Overview

    Glaucoma Overview

    For those of us who depend so heavily on our sense of sight, the idea of losing it is scary. Even scarier? The prospect of losing it without warning due to a silent thief called glaucoma. See more »

  • How Colorblindness Works

    How Colorblindness Works

    Roses are red, violets are blue -- well, bluish. The sky is blue, too. Grass is green. These are things that most of us know for a fact and don't question. But what if you were colorblind? What would you see? Is life one long black-and-white movie? See more »

  • Is too much TV really bad for your eyes?

    Is too much TV really bad for your eyes?

    When you can't take your eyes of the boob tube for one entire Saturday afternoon, are you doing them irreversible damage? Your parents probably told you so, when you were a kid. Were they right? See more »

  • Refractive Vision Problems

    Refractive Vision Problems

    Millions of people have refractive vision problems -- when the eyes get blurry or can't focus on an object. Learn about four major types of refractive vision problems. See more »

  • What does it mean when someone has 20/20 vision?

    What does it mean when someone has 20/20 vision?

    We all know 20/20 vision is a good thing, but just what do those numbers mean? See more »

  • What if I crossed my eyes for 10 minutes?

    What if I crossed my eyes for 10 minutes?

    "Don't cross your eyes -- they'll stick that way!" That's something most of us have heard from our mothers at one time or another. Can your eyes really get stuck? See more »

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