Refracting is a big word that means bending light rays. If a person has vision worry, it ‘s often a deflective problem. Glasses or contact lenses work thus well because they can correct deflective problems. In other words, they bend the lighter rays in a way that lets you see more clearly .
Laser operation besides can correct some sight problems, but it ‘s not allowed for kids because they ‘re still growing .
Nearsighted and Farsighted — Which Is Which?
myopia and hyperopia are common refractive problems. It ‘s comfortable to get the two confused :
- Nearsighted (also called myopia) means someone can see stuff that’s near, like a book, but has trouble seeing stuff that’s far away.
- Farsighted (also called hyperopia) means someone can see stuff that’s far away clearly, but has more trouble seeing up close (like reading the print in a book). Some farsightedness in kids is normal because they can focus their eyes to make up the difference. But some kids are very farsighted and need glasses or contact lenses.
In both cases, the visualize is not properly focused on the retina. With myopia, the image becomes focused in front of the retina. With hyperopia, the image is focused behind the retina .
Another refractive trouble is called astigmatism ( say : uh-STIG-muh-tih-zum ). This means that the cornea is an uneven shape, and it bends the light in different directions. This can distort what a person sees and make things look bleary .
Glasses or touch lenses correct sight because they allow the eye to focus unhorse in the right spot on the retina — the spot that produces the clearest visualize. Because everyone ‘s eyes are different, a pair of glasses that makes one person see wonderfully may look terribly bleary to person else. You know this if you ‘ve ever tried on person else ‘s glasses !
If you need glasses or contact lenses, your doctor of the church will write you a prescription. In this case, a prescription drug does n’t mean medicate you ‘ll pick up at the drugstore. A imagination prescription is a patch of composition 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 having fuss with your vision, your ma or dad can take you for an eye examination. This might happen as function of your regular checkup with the repair .
But you need to see a vision specialist if your parents or your doctor think you might need glasses. You might see an ophthalmologist, optometrist, or an optician .
What ‘s the deviation ?
- An ophthalmologist is a medical doctor trained to treat vision problems; this includes prescribing eyeglasses and contact lenses, but also doing eye surgery for other eye-related problems.
- An optometrist is a licensed professional who specializes in eye exams and in figuring out the right prescriptions for eyeglasses and contact lenses.
- An optician makes or sells eyeglasses and contact lenses according to an ophthalmologist’s or optometrist’s prescription.
At your center examination, you ‘ll be asked to read from an eye graph. This is the chart with letters or numbers in different sizes. You besides might be asked to look at some text up close, like reading from a book. These tests measure how well you see from close and from far away .
If you need glasses or contact lenses, there ‘s a especial doodad that lets you try a few different prescriptions until you find the one that gives you the clearest vision. It ‘s kind of like a big copulate of glasses, but a bunch together of different lenses can be switched in and out in truth quickly. The person doing your eye examination will switch between two different lenses and say, “ Do you like this one or that one ? ” You say which one looks absolved. There is no right answer — barely what is best for you. Remember, the mind is that you get the correct prescription so your vision will be ace !
The Fun Part
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 hardy. But besides make indisputable you like them — you ‘ll be wearing them a lot !
The lenses themselves can be made of different materials, such as guard glass or shatterproof plastic ( polycarbonate ). Because looking glass tends to be heavy and it may shatter, most glasses nowadays 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 besides want to find out how to clean them by rights. And it helps if you have a glasses shell and put them in it when you ‘re not wearing them. The final thing you want is to sit on your newfangled glasses. crunch !
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 technical in how to wear them safely and keeping them clean. The most significant thing about liaison lenses is beneficial hygiene to prevent infections in your eye .
But the truly fun part of newfangled glasses or contact lenses is how well you can see. They can make your solid world count better !