Lenses High quality, impact resistant blue light blocking lenses. Get additional protection from eye strain and more comfort while reading from digital screens. Blue light filtering lenses block up to 30% of potentially harmful high-energy light ( HEV ). Frame Hypoallergenic, lightweight and optical friendly. Handcrafted premium quality acetate frames featuring 5 barrel German stainless steel hinges. Size Frame Height: 50mm Frame Width: 142mm Medium Fit Packaging Complimentary case included.