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let the sunshine in, but not the harmful rays - polycarbonate lenses

by:Cailong     2019-08-23
let the sunshine in, but not the harmful rays  -  polycarbonate lenses
Leslie Oldman Young
2011 sunglasses are not just for summer.
Skiing on fresh snow, skating on reflective ice or hiking at high altitudes can be harder for your eyes than a day on the beach.
As many East Coast readers may have noticed this week, snow reflects nearly 80% of the sun's rays. Dry beach sand?
Only 15%
Most of us already know about ultraviolet (UV)
Light can cause skin cancer and other problems.
But that's not all to worry about.
"Most people don't appreciate the damage that ultraviolet rays do to their eyes," the doctor said . "Rachel J.
Bishop is a clinical eye specialist at the National Eye Institute in Bethesda, Maryland.
In winter or summer, a few hours of bright sunlight burns the surface of the eye, leading to a temporary state of pain, known as light cornea.
Over time, unprotected exposure can lead to cancer in cataracts, eyelids, and skin around the eyes.
UV exposure may also increase the risk of amd, the main cause of blindness in people over the age of 65.
Although cataract can be removed by surgery, there is no way to reverse the damage of the central area of the retina-spots.
Worried about advertising?
Consider Licensing this article to buy yourself a new pair of UV-
Protect the tone.
But don't let the price and style be your only guide.
"Some cheap sunglasses are great and some expensive ones are not," said Dr. Lee R.
Duff, an eye doctor in Hollywood, Florida.
Clinical Reporter of the American Academy of Ophthalmology.
In fact, some fake designer frames can hurt your eyes more than you do without glasses at all.
Below, some advice on how to find sunglasses that protect both eyes and do not rob your wallet.
Read fine prints that are exposed to UV radiation for a long time to damage the surface tissue of the eye and the retina and lenses.
However, while the Food and Drug Administration regulates sunglasses as medical devices, the agency does not stipulate that sunglasses must provide UV protection at any specific level.
As a result, items in the regular sunglasses store can be completely ineffective from protective to complete.
Looking for labels and labels that show that a pair of sunglasses provide at least "98% UV protection" or "blocking 98% UVA and mw uv rays.
Don't buy them if there is no label or something that says something blurry like "UV absorption" or "blocking most UV rays --
Sunglasses may not provide much protection.
To get the best defensive effect, Dr recommends looking for sunglasses that "block all UV radiation up to 400 nm", which is equivalent to blocking 100% UV raysDuffner.
Ideally, choose the right style and sunglasses should cover the side of the eye to prevent stray light from entering.
The surround lens is the best, but if it's not an appealing style, look for the close range --
Wide lens glasses.
Avoid models that use small lenses, such as John Lennon.
Stylish sunglasses.
Don't be tempted by dark colors.
UV protection has nothing to do with how dark the lens is.
Sunglasses in green, amber, red and gray can provide the same protection as dark lenses.
In order to get the minimum color distortion, select the gray lens, Dr. Duffner.
If you are often distracted by strong light while driving, boating or skiing, looking for a polarized lens, it blocks the horizontal waves that produce strong light.
But keep in mind that the polarization itself does not block UV rays.
Ensure that the lens also provides UV protection of 98% or 100%. Though the F. D. A.
The agency does not require sunglasses to have UV protection but insists they will be affected
Resistance standards-
This basically means they don't break when they hit.
Even so, for example, if you wear sunglasses while riding a bike, sailing or gardening, consider buying a pair of glasses with polycarbonate lenses that are 10 times more durable than regular plastic or glass lenses.
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Avoid sidewalk vendors buying a pair of stylish Chanel counterfeits without UV protection and you may look pretty --
But your eyes will be hurt.
Colored lenses will relax your pupil and allow more harmful radiation than you do not wear glasses at all to hit your retina.
Buy glasses from well-for safety
Not a drug, chain or department store established from a vendor on the street.
Go around: you should be able to find a pair of pharmacy sunglasses for $10 to $20, providing all the protection you need.
One of the products Sunglass warehouse recently offers.
Com, for example, is general and pilot-
Stylish sunglasses with full UV protection for only $13.
Don't forget the kids upgrade your kids from their Dora and spiders --
Men's toy sunglasses with legal shades of 98% to 100% UV protection.
Children with lights
Colored eyes are particularly vulnerable to sunlight. Duffner.
Injuries are cumulative, so the sooner children get into the habit of wearing sunglasses, the better their eyes will be.
If your child is exercising regularly, you can also consider buying sports
Specific goggles.
Eye injuries are the main cause of blindness in children, and most injuries occur when playing basketball, baseball, ice hockey, or racket.
The National Eye Institute says it believes protective glasses can prevent 90% of movement.
Children related to eye injuries.
Advertising tests old glasses that don't want to wear new sunglasses?
If you already have a favorite pair of glasses but don't know what kind of protection they offer, ask your local optician if they have a UV meter.
This device can measure the UV protection of your glasses and help you determine if you should buy a new pair of glasses.
The doctor said: "Most eyewear companies have such a 1 m, and it can be done easily . "Duffner.
Even if the contact lenses you wear provide UV protection, you don't know.
Contact lenses are located on the cornea in the center of the eye and therefore do not protect the surrounding white area (Membrane sac)and skin.
"I see a lot of older patients have growth on their eyes caused by sunlight damage," Dr. Bishop said.
These yellow lumps, known as pinguecula, often cause irritation and dryness of the eyes and may eventually destroy vision.
Adults wearing contact lenses still have to wear sunglasses outdoors.
Finally, if you wear prescription glasses, you can avoid buying sunglasses by purchasing clips
Ons attached to the frame or coated with UV on the lens.
Presto, you're a pair.
A version of this article was printed on page B6 of the New York edition on January 15, 2011 with the title: let the sun in, not the harmful light.
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