After long-term use of sunglasses, will their UV filtering effect remain the same as before?

u003cbru003eIf you have a favorite pair of sunglasses, you may have used them for years. Can sunglasses that have been used for a long time still protect the eyes from ultraviolet (UV) damage? Recommended reading: It happened after 50 hours of sun exposure... The study did not directly answer the question of whether UV protection has deteriorated. The only way to be sure is to test your sunglasses. Sunglasses with recommended protection will filter out all UV rays. Ultraviolet rays can damage the surface tissues of the eye, the cornea and the lens. Over time, UV damage increases the risk of cataracts, macular degeneration, and other eye diseases. These conditions can reduce your vision. A 2016 study from the University of São Paulo, Brazil, took a look at whether the UV protection of sunglasses was adequately tested. Dr. Jeff Pettey, assistant professor of ophthalmology at Moran Central University in Utah and spokesperson for the American Academy of Ophthalmology, said, 'This is different from testing whether the UV protection in sunglasses will disappear.' The researchers found that the Brazilian manufacturer's test may underestimate the The amount of ultraviolet radiation that the glasses will cause over time. It is not clear whether these findings mean anything to the US sunglasses test. Brazil’s exposure to ultraviolet radiation is higher than that of the United States. Although this study raises more questions than answers, Dr. Petty said that consumers should not panic or rush to change their beloved shades. No one currently recommends using sunglasses in retirement. In recent years, UV blocking technology has improved. Most sunglasses today have UV protection embedded in the lens, rather than coated on the lens. If you are concerned about the age and safety of sunglasses, you can test them in an optical shop equipped with a UV meter. If you are ready to buy a new pair of sunglasses, Dr. Pettey provides these tips to choose the most protective sunglasses: look for a label that says '100% UVA and UVB protection' or '100% UV protection 400'. Choose a larger frame that covers the eyes and surrounding skin. Frames wrapped around the sides of the face provide maximum protection.
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