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Some interesting Eye Facts

Only boys can be color-blind?

Boys are just more likely to have it. About one in every 12 has some level of color blindness. It only happens in about one of every 200 girls.

Despite the name, it doesn’t mean you can’t see colors. But it might be hard to tell red from green. There’s also blue-yellow color blindness, but it’s much rarer. People who are truly color-blind have a condition called monochromacy.

Two parents with brown eyes could have a blue-eyed child.

We used to think eye color was controlled by a single gene. There was only one possible color your eyes could be. We also believed brown eyes always won out over blue eyes.

Now we know there are at least eight genes that control eye color. That means two brown-eyed parents can, indeed, produce a blue-eyed child. And it’s also why two blue-eyed parents can have a child with green or brown eyes.

Eye color can change after you’re a baby.

Yes, most babies are born with gray or blue eyes. They might change color over the course of a year. By about age 6 your eyes are the color they’ll be for the rest of your life. It’s rare, but your eyes could change color when you’re a teen or young adult. The cause is in your genes — if a family member’s eyes changed, it’s more likely yours will, too.

Everyone has a blind spot.

Even if you have perfect sight, there’s still a blind spot or blank area in your field of vision. You don’t know it’s there because your brain fills in that area with what you expect to see there. Some people’s blind spots are bigger than others, but it’s likely all mammals have them. It’s just the way our eyes are built.

You can catch a cold through your eyes.

Yes, by touching a sick person or a germ-covered surface (like a doorknob), and then putting your hands on your eyes or nose. Cold viruses travel easily through the duct that connects your eyes to your nose and throat. It gets into your body and causes infection. If you don’t want to get sick, keep your hands away from your face, or wash them before you touch it.

You can’t lose a contact lens behind your eyeball.

Relax. There’s no way a contact lens can slip over the top and get stuck back there forever. The area between your eyelid and eyeball is enclosed in a pouch called the conjunctival sac. The contact can’t get past it. Flush your eye with saline solution to wash out a misplaced lens.

You see spots after looking at a bright light because:

Your retina, a bundle of light-sensitive tissue at the back of your eye, reacts to bright light. It can take a while to recover. The spots you see are afterimages.

If you cross your eyes, they’ll get stuck that way?

Mom wasn’t right about this one, either. Your eyes won’t stay crossed forever, no matter how often you make faces.

How do your eyes “see” an image?

All your eyes do is process light. It’s your brain that creates the picture. First, your eyes take in light and convert it into electrical nerve signals. They travel to your visual cortex, the part of your brain that controls sight. It converts the signals into the image you see.

 

How to choose sunglasses Kinds of Contact Lenses

 

 

More Topics

Structure of Eye

Get Regular Eye Exams 

How to keep your Eyes Healthy

Have a Comprehensive Dilated Eye Exam

Foods to improve Your Eye Health

Common Vision Problems

Eye safety tips from computer screen Age-related Eye Diseases

 

Reference

http://www.webmd.com/eye-health/features/tips-for-healthy-eyes#3

https://nei.nih.gov/healthyeyes/eyehealthtips

http://kidshealth.org/en/kids/eyes.html#

http://www.allaboutvision.com/nutrition/foods.htm

http://www.bausch.com/vision-and-age/20s-and-30s-eyes/healthy-eyes

http://www.healthline.com/human-body-maps/optic-nerve

https://en.wikipedia.org/wiki/Human_eye

http://www.medicinenet.com/script/main/art.asp?articlekey=10609

http://www.aao.org/eye-health/tips-prevention/top-sunglasses-tips

http://www.aoa.org/patients-and-public/caring-for-your-vision/contact-lenses/advantages-and-disadvantages-of-various-types-of-contact-lenses?sso=y

http://www.everydayhealth.com/vision-center/lenses-and-beyond/contact-lens-options.aspx

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