The single most important reason to wear sunglasses is to protect your eyes from the sun’s ultraviolet (UV) rays. Long-term exposure to UV rays has been linked to the development of serious eye issues, including macular degeneration and cataracts.
Protecting your eyes from the sun’s damaging rays is essential. To do so, wear sunglasses that block nearly 100% of UV rays (also called UV 400 protection) when you are outside during the day. Even when the skies are cloudy, wear sunglasses as a precaution. You can’t depend on the clouds to stop the UV rays from getting through.
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