Although your favorite sunglasses were not a cheap investment, you probably need to replace them more often than you think. According to a new study in Brazil, UV protection in your sunglasses may deteriorate over time.
On average, most Brazilians wear the same pair of sunglasses for two years. It has not been proven that lenses have the same level of protection after two years of exposure to ultraviolet radiation. According to Jeff Pettey, clinical spokesperson for the American Academy of Ophthalmology, the results probably have the same implication in the United States, and these findings are relevant for the sunglasses industry in the US.
Currently, there is no clear recommendation on how often should we replace our sunglasses. Dr. Pettey says: "While there is no official recommendation right now, it might make sense to consider looking for a new pair if you’ve worn the same ones regularly for a couple of years.”
Protection of our eyes is essential since UV exposure can lead to retinal damage, cataracts, and other eye problem. The first step to protecting your eyesight is buying good sunglasses that are labeled “UV400” or “100% UV protection”. Professor Liliane Ventura, of Sao Paulo University, says that it’s not a good idea to buy glasses from outdoor locations where they have been already exposed to sunlight.
Gildshire Editor, Elvira Barucija