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.

Learn More

All eye colors are an interaction of brown pigment and light, but some eye colors occur much less often than others. Here are the six you'll see the least.

By Jesslyn Shields

Nearly all newborns have some shade of blue eyes at birth. But after a few months, they change. What's going on?

By Allison Troutner

Knowing your eye shape can help with everything from selecting eyeglass frames to shaping the perfect brow.

By Laurie L. Dove


Stanford researchers have developed a new white cane, incorporating sensing and wayfinding approaches from robotics and self-driving vehicles. Could this new white cane reshape life for the visually impaired?

By Allison Troutner

Blue light glasses are super popular these days. But do they work the way marketers promise?

By John Perritano

The eye twitching that's driving you crazy — it's likely caused by nothing more than stress or fatigue. But you may need to see a doctor if you have other symptoms, too.

By Michelle Konstantinovsky

You had LASIK surgery a few years ago, and your vision has started to blur again. Is this normal?

By Nathan Chandler


Colorblindness affects around 300 million people worldwide. What is it and how can glasses help?

By Melanie Radzicki McManus

Maybe if you look at it with only one eye -- in the dark.

By Karen Kirkpatrick

And it's not because of all that screen time.

By Melanie Radzicki McManus

Think your peepers are passé? Some cutting-edge cosmetic procedures can take your brown eyes to bright blue — with a few inherent risks.

By Laurie L. Dove


Poetry is full of references to salty and bitter tears, but there's not much about bloody tears. Besides movie villains who weep blood, is this phenomenon real?

By Laurie L. Dove

As you're wiping away the crust from your eyes in the morning, do you ever ponder why it forms in the first place?

By Laurie L. Dove

Are you getting too up close and personal with your TV? Your eyes might think so.

By Alison Cooper

If someone told you that oodles of arachnids are jumping (and mating) on your eyelashes, you might be inclined to laugh it off. But it's true. Mites are happily living all over your face. What are they doing there anyway?

By Jennifer Sellers


You probably don't give much thought to eye boogers, except maybe when you wipe them away. But you're about to learn a lot more about them (and while you're reading, you'll probably check your eyes for crud a few times).

By Jennifer Sellers

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?

By Debra Ronca

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?

By Sarah Winkler

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?

By Molly Edmonds


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.

"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?

By Marshall Brain

Eyebrows add expression to your face, and are often waxed and plucked in the name of beauty. But why do we have them in the first place, and what would happen if they went away?

By HowStuffWorks.com Contributors

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?

By Katie Lambert


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.

By Craig Freudenrich, Ph.D.

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