Why Choose Photochromic Progressive Multifocal Reading Glasses Photochromic Reading glasses Lenses are clear when indoors or at night and automatically darken to a sunglasses tint when exposed to UV sunlight. Lenses will begin to clear as soon as they are away from UV sunlight, and will be noticeably lighter and mostly clear within a few minutes. They absorb UV radiation that can otherwise damage your eyes. At the same time, it meets the requirements of long-distance, near-use and various distances in the middle. The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. Previous page Blue Light Blocking Lenses The lenses filter out harmful blue light from digital screens (and the sun, for that matter). Anti Eye Fatigue Effectivly block harmful blue light,Protect your eyes from daily life and electronic products. Comfortable One-Piece Nose Pad It can prevent deformation slipping and improve comfort. Designed For Performance The lightweight and durable frame can be used for a long time. Photochromic Gray Glasses The lenses automatically darken to gray when exposed to ultraviolet light. Next page 1 Hd Transparent Lens 2 Anti Blue-Ray 3 Nose Pads 4 Sturdy Frames 5 Sunlight Effect