Like HowStuffWorks on Facebook!

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.

Featured
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?


How Glasses Correct Colorblindness

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

Could Your Smartphone Cause Temporary Blindness?

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

Half the World Will Be Nearsighted by 2050

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

Is it possible to change your eye color?

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

Is it possible to cry blood?

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? See more »

What are eye boogers?

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

Is sitting too close to the TV really bad for your eyes?

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

Are there really arachnids living in my eyelashes?

If someone told you that oodles of arachnids are jumping (and mating) all over your eyelashes, you might be inclined to laugh it off. That sounds more like a scene from a horror movie than a scientific reality, right? Right? See more »

What are eye boogers made of?

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). See more »

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 »