Progressive Multifocal Readers Classic Included 3 Magnification Strengths: Distance,Transition, & Reading. The bottom of the lens is the reading magnification strength. The middle is a reduced magnification, perfect for computer work. The top most part of the lens has a slightly more reduced magnification for distance viewing and regular interaction. Anti Eyestrain/Anti Scratch/Anti Smudgy/Anti UV. Changes color according to the intensity of ultraviolet rays, is both reading glasses and sunglasses. Product Description Frame Length: 146mm Lens Width: 56mm Lens Height: 35 mm Temple Length: 145mm Bridge Width: 18mm Material: Plastic Features: Anti-Blue Rays, Anti UV Cleaning: 1. The glasses should be treated carefully to avoid damage and cleaned regularly. 2. Clean the lens using soap water or neutral detergent, gently wipe dry with the soft glasses cloth included. ➤ Note: * Due to the manual measurement of the product size there will be a certain error, due to different spotlights and different screen colors, the actual object may have a certain color difference. Please refer to the actual product received. * Delivery time is generally 10-15 days. If you do not receive your purchase information within 30 days, please contact us in time. * We offer the best customer service. If you need help, please contact us by e-mail. We will answer you within 24 hours and I wish you a happy life.