The body is fascinating. It is made up of tons of complex systems that work perfectly together to maintain homeostasis and health, and fix problems when they arise. If we do our part (eat healthy, exercise, sleep enough, manage stress), we can help the body function even better. One of the most complex and interesting parts of the body is the eye. Somehow, this tiny structure exposes you to the entire world, so it is important to take care of them and keep them healthy. Here are some weird facts you might not know about the eyes and vision.
Eyes Can Get Sunburned
Yep, that’s right! Even the eyes are vulnerable to the sun’s UVA and UVB rays, which is why it is so important to wear sunglasses. Even though it is the winter, the sun still shines bright, so wear sunglasses when you go outside, hit the slopes, or are exposed to lots of sunlight in any way. Unlike the skin which becomes painful and red when sunburned, the eye tissue tends to harden overtime, which can necessitate surgery.
20/20 Is Not Perfect Vision
If you have ever heard someone bragging about his or her 20/20 vision, let it be known that the person was in fact bragging about being average! 20/20 vision means that you can see at 20 feet what other people can also see at 20 feet. This is the norm, the standard, the usual medium for vision. 20/15 is better, and 20/10 is pretty much as good as you can get as a human being.
Eyeballs Actually Get Bigger With Age
…to a certain extent. When you are born, your eyeballs are about 16 mm wide. By the time you hit puberty, eyeballs reach their maximum width of around 23 mm. Unlike your nose and ears, eyeballs do not keep growing every day of your life.
Staring at the Sun WILL Cause Blindness
When you were a kid, did you ever dare a friend to stare at the sun for 5 seconds? Or perhaps you were the one being dared! Let it be known that staring at the sun can in fact lead to blindness. Think about what sunlight does to a piece of paper when you channel it through a magnifying glass. THAT is what happens to your eyes when you stare at the sun! The eye lens channels sunlight just like the magnifying glass, burning a spot on your retina that can cause a permanent loss of vision. It is termed, “solar retinopathy.”
*Disclaimer: Always consult your physician or other health care professional before seeking treatment or taking related advice herein.*
Story Credit: 20 Things You Probably Didn’t Know About Your Eyes by Amanda L. Chan
Photo Credit: Used under Creative Commons Licensing
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