With their rounded, semi-rimless design, the Latch Key L Prizm Sunglasses evoke a retro, vintage style, but Oakley added the most modern optical technology to bring vintage to the contemporary world. Prizm technology not only reduces glare, but also enhances colors and contrasts for a sharper, brighter view of your surroundings. Oakley also equipped the lenses with High Definition Optics to enhance clarity, reduce refraction, and provides 100% protection against UVA, UVB, UVC, and harmful blue light up to 400nm. Proposition 65 Warning for California Consumers: This product contains chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm.