Bon Chic Blue Light ReadersLenses: 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 ). These sunglasses are made from highest quality polycarbonate, which means they are more comfortable and durable than most other sunglasses. Size Frame Height: 55mm Frame Width: 145mm