Sunglasses could save your vision
Sunglasses should be worn anytime you’re outdoors, regardless of the season. So, even if there is snow, you should wear sunglasses. The white snow will reflect the sun’s rays, which can actually make them stronger. Furthermore, if you are taking a medication that increases sensitivity to sunlight, then you are even more vulnerable.
Experts recommend that you wear large wraparound sunglasses for best protection. You will always want to check the lens for UV absorption—the best is 100 percent absorption.
Look for a scratch resistant polycarbonate plastic lens that is polarized so that it reduces brightness. Polarization does not protect UV rays, but it can improve vision by removing glare.
To test if your sunglasses are good for you, hold them away from your eyes a few inches and look at a square pattern, such as a tiled floor. Close one eye and move the glasses up and down. If the lines between the squares or rectangles squiggle, then you need to keep looking.
Be mindful of any claims that may not appear legitimate. Some brands promise you additional protection, but there isn’t much research behind many of these claims.
Lastly, with or without sunglasses, never look directly at the sun.