Sunglasses protect your eyes due to the physical barrier, but also protect your eyes from harmful Ultra-Violet radiation from the sun which cause cataracts and macular degeneration. The lens inside our eyes becomes cloudy due to sun exposure over the years and wearing sunglasses with a UV400 blocker slows down this natural progression. The macula that we use to see faces and read documents breaks down with exposure to UV rays causing a loss of central vision. Prevention is the key to maintaining good vision – wear good quality sunglasses with good coverage to protect your precious eyes for a lifetime!