Suppose You Have Your Father 's Reading Glasses

Why do some people need glasses and others don't?

Everyone's optics are a piffling different — non merely the color, simply the manner they work and how well they see. Sometimes all the parts of the middle don't work together the way they should. But eyeglasses or contact lenses, too called corrective lenses, tin help well-nigh people see more clearly.

How Eyes Work

The eyeball includes:

• the cornea (say: KOR-nee-uh), clear tissue that helps the middle focus
• the iris , the colored part
• the pupil (the black circle in the center of the iris, which is really an opening in the iris, that lets light enter the center)
• the lens, which also helps the eye focus
• the retina , at the very dorsum of the middle

When all of the optics' parts are working properly, a kid doesn't accept vision problems. You can see because your eyes capture an image like a camera and send that image to your encephalon, where it can exist interpreted. For instance, if there's an elephant in front end of you, almost instantly, your brain says, "Hey, that's an elephant."

Your eyes need to bend light rays so the image tin can be focused sharply on your retina. The meliorate your retina records the image, the more than likely that your encephalon will interpret the paradigm, and the more likely you will meet the image conspicuously.

Refracting is a big word that means bending light rays. If a person has vision trouble, it's often a refractive trouble. Glasses or contact lenses work so well because they can right refractive problems. In other words, they curve the calorie-free rays in a way that lets you encounter more clearly.

Laser surgery also can correct some vision bug, but it'due south not immune for kids because they're still growing.

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Nearsighted and Farsighted — Which Is Which?

Nearsightedness and farsightedness are common refractive problems. Information technology's easy to get the two confused:

• Nearsighted (also called myopia) means someone tin run into stuff that's nigh, like a book, but has problem seeing stuff that'south far away.
• Farsighted (also called hyperopia) ways someone tin see stuff that'south far away clearly, merely has more problem seeing up close (similar reading the impress in a book). Some farsightedness in kids is normal because they can focus their eyes to brand up the divergence. But some kids are very farsighted and need spectacles or contact lenses.

In both cases, the image is non properly focused on the retina. With nearsightedness, the image becomes focused in front of the retina. With farsightedness, the epitome is focused backside the retina.

Another refractive problem is chosen astigmatism (say: uh-STIG-muh-tih-zum). This means that the cornea is an uneven shape, and information technology bends the light in different directions. This can misconstrue what a person sees and make things look blurry.

Glasses or contact lenses right vision because they permit the center to focus light in the correct spot on the retina — the spot that produces the clearest prototype. Because everyone's eyes are different, a pair of glasses that makes 1 person see wonderfully may look terribly blurry to someone else. You know this if y'all've ever tried on somebody else's spectacles!

If yous need glasses or contact lenses, your doctor will write y'all a prescription. In this example, a prescription doesn't hateful medicine y'all'll pick upwardly at the drugstore. A vision prescription is a slice of paper with numbers on it. The people who will make your spectacles for you need these numbers to create lenses that volition right the way your heart bends light. Remember, the target is right in the center of the retina.

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Eye Exams

If you're having trouble with your vision, your mom or dad can take you lot for an middle exam. This might happen as office of your regular checkup with the dr..

But y'all need to run into a vision specialist if your parents or your doctor think you might need glasses. You might see an ophthalmologist, optometrist, or an optician.

What'due south the difference?

• An ophthalmologist is a medical doctor trained to treat vision bug; this includes prescribing eyeglasses and contact lenses, but besides 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 co-ordinate to an ophthalmologist'due south or optometrist'due south prescription.

At your eye exam, you lot'll be asked to read from an eye chart. This is the nautical chart with letters or numbers in different sizes. You as well might be asked to expect at some text up shut, like reading from a volume. These tests measure how well yous run across from close and from far away.

If you need glasses or contact lenses, in that location's a special gizmo that lets y'all effort a few different prescriptions until you lot detect the i that gives you the clearest vision. It's kind of like a big pair of spectacles, but a agglomeration of different lenses can be switched in and out really rapidly. The person doing your eye exam will switch betwixt 2 different lenses and say, "Practise you like this i or that 1?" Yous say which one looks clearest. There is no right answer — simply what is all-time for you. Recollect, the thought is that you get the right prescription so your vision will be top-notch!

The Fun Part

If you're going to go glasses, information technology'southward fourth dimension to pick frames. Information technology can be fun to try these on. Choose ones that are comfortable and sturdy. But also make sure y'all 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 drinking 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 lot tin habiliment on the field.

With spectacles, you'll also desire to find out how to make clean them properly. And it helps if yous have a glasses example and put them in it when you're not wearing them. The concluding matter you want is to sit on your new glasses. Crisis!

If yous're going to get contact lenses, you'll get some advice from the ophthalmologist or optometrist almost which kind will be all-time for you. Some are dispensable and others need to be cleaned. When you learn which blazon you're going to get, you can offset becoming an practiced in how to wear them safely and keeping them make clean. The most important thing almost contact lenses is expert hygiene to prevent infections in your eye.

Just the really fun role of new glasses or contact lenses is how well yous tin meet. They tin can make your whole world look better!

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Source: https://kidshealth.org/en/kids/glasses.html

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