Experts Say It’s Just as Important to Wear Sunglasses in the Winter Blog Local News 11/17/2017 Tweet While sunglasses are fashionable in the summer, you might want to think twice before packing them away for the winter. This is because clouds only block about 20 percent of UV rays, and snow can refract light. Those at Original Sun say the proper fit and lens material will ensure maximum protection. They say choosing a comfortable personalized pair of shades makes it easier to wear them more often, which can prevent the early onset of Glaucoma, cataracts, and some other health issues. “Mainly migraines because when you’re not having the right eye care you tend to tense up your eyes and then the muscles around your eyes also become tense because you’re squinting.” Preffer says people with blue or green eyes are more susceptible to eye sensitivities and should find a darker lens.