Prescription sunglasses are no longer required with the Solarshield Sunglasses. These sunglasses fit over regular eyeglasses and block 100% of UVA and UVB sun rays. Providing 40% more protection than regular sunglasses with extra wide side bars and top bar. Designed for the protection of seniors, who often need additional sun protection because of: sensitivity to sunlight, dry eyes, allergies that create eye irritation and post-cataract surgery.