With a reflective optical coating (called a mirror coating or flash coating) on the outside of the lenses, mirrored sunglasses make a strong visual statement. This coating will decrease the amount of light to your eyes, reduce glare, and increase clarity
and visibility. The reflective surface of mirrored lenses can block up to 60% more light than standard sunglasses, making them a popular choice for activities like water and snow sports, driving, and air travel.