Did you know that sunglasses, or at least sunglass lenses, regularly need to be replaced? According to a study conducted at the University of São Paulo, the UV protection that sunglasses provide deteriorates over time. If you've been rocking those shades for two or more years, it might be time to get a new pair.

In addition to the UV-blocking properties, anti-reflective and anti-scratch coatings wear down, and the frame material may become brittle over the years, too.

UV Light and Sunglasses

The protective efficacy of your sunglasses comes in large part from the lens coating of dyes and pigments that reflect and absorb ultraviolet radiation. However, this protective coating can break down over time. Wear and tear can cause an invisible web of tiny abrasions, compromising its UV-blocking power.

Why It's Important to Protect Your Eyes From UV

Protecting your eyes from the sun is critical no matter where in the world you are, as UV exposure places you at risk for developing eye diseases like eye cancer, pterygium, and pinguecula, as well as cataracts and macular degeneration.

What to Look for When Getting New Sunglasses

When choosing new sunglasses, make sure they're labeled 100% UV protection or UV400. Keep in mind that factors like cost, polarization, lens color, or darkness don't have much to do with the level of UV protection. The size and fit of the sunglasses is important. Bigger is definitely better if you spend a lot of time outdoors.

For more information about UV safety, or to get the perfect sunglasses tailored to your vision needs and lifestyle, contact Optique Family Vision Care in Springfield today!