How Do Eyeglasses or Contact Lenses Correct Our Vision?
If your eyes did not do their job, your eyesight would be fuzzy and blurred. People who have imperfect eyesight can correct their vision by wearing glasses. In each of your eyes there is a lens that bends the light and focuses an image inside your eye, on the “retina.”
If the lenses in your eyes don’t bend the light properly, you need glasses. The lenses in glasses correct our vision by bending light entering the eyes so that an image is properly focused on the retina. Contact lenses, which float on the surface of the eye, accomplish the same purpose.
Because everyone’s eyes are different, a pair of glasses that makes one person see wonderfully may look terribly blurry to someone else. You know this if you’ve ever tried on somebody else’s glasses!
If you need glasses or contact lenses, your doctor will write you a vision prescription. A vision prescription is a piece of paper with numbers on it. The people who will make your glasses for you need these numbers to create lenses that will correct the way your eye bends light. Remember, the target is right in the center of the retina.
If you’re going to get glasses, it’s time to pick frames. It can be fun to try these on. Choose ones that are comfortable and sturdy. But also make sure you like them — you’ll be wearing them a lot!
The lenses themselves can be made of different materials, such as safety glass or shatterproof plastic (polycarbonate). Because glass tends to be heavy and it may shatter, most glasses today are made of polycarbonate plastic. If you play sports, you may want to ask about special eyewear you can wear on the field.
With glasses, you’ll also want to find out how to clean them properly. And it helps if you have a glasses case and put them in it when you’re not wearing them.
If you’re going to get contact lenses, you’ll get some advice from the ophthalmologist or optometrist about which kind will be best for you. Some are disposable and others need to be cleaned.
When you learn which type you’re going to get, you can start becoming an expert in how to wear them safely and keeping them clean. The most important thing about contact lenses is good hygiene to prevent infections in your eye.
But the really fun part of new glasses or contact lenses is how well you can see. They can make your whole world look better!