The radiation glasses 52 feature high quality, distortion-free SF-6 Schott glass radiation-reducing lenses with 0.75mm Pb lead equivalency protection. These lead glasses also provide 0.50mm Pb lead equivalency lateral protection. The 52 lead glasses have clear CE Certified Lens and weight 90g. These radiation glasses 52 are prescription available. Made of high-quality plastic, it is a durable and lightweight oversized frame. The 52 radiation glasses feature adjustable nose pads and integrated side shields. These Phillips Safety prescription radiation glasses are available in black, tortoise, and blue.