Computer Reading Glasses Bamboo Wood Design,Anti Blue Light UV Relieve Visual Product Features Imported plastic frame plastic lens non-polarized Lens width: 48 millimeters Lens height: 40 millimeters Arm: 140 millimeters BLUE LIGHT BLOCKING - Blue light filter glasses could protect your eyes from harmful blue light when you are using electronic device, such as monitor, tablet, cell phone,etc.Our computer glasses can cut more than 30% harmful blue light.It helps you work and live in a more healthy way. REDUCE EYESTRAIN - Get rid of tired eyes, eye strain, headaches and migraines as well as protecting your eyes from long term damage. BETTER SLEEP - The screens we look at every day emit blue light which causes headaches, insomnia, eye strain, and make it harder to fall asleep and stay asleep.With our computer glasses,you can also have a good sleep after long periods of time before the screen. FDA REGISTERED - Fully registered with the Food and Drug administration to import Class I medical devices. 100% RISK FREE PURCHASE - In case any broken problem happens, contact us without hesitation to solve the problem until satisfaction. We provide lifetime after sale service. Customers can return and get refunded for any reason. You have no risk to try. Product Description FEATURESFrame Material:PlasticLens width: 1 7/8" (48mm)Frame width: 5 9/16"(142mm)Lens height: 1 9/16" (40mm)Frame height: 1 13/16" (46mm)Bridge (DBL): 1/2"(13mm)Temple length: 5 1/2"(140mm)Spring hinge: NoLenses: AsphericHead size: MediumCARETo avoid damage, never clean your eyeglasses with paper towels or clothing or alcohol, and also avoid using household detergents or soaps. While a few mild soaps don't harm lenses, today's extra strength soaps are powerful enough to slowly disintegrate lens coatings ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Our stock all ships from our US-based warehouses.Shipped via UPS or USPS(depending on location and package weight) Unless stated otherwise, all orders will ship within 24 hours of your payment being processed.Check our feedback to see the great reviews of FAST shipping we offer.Shipping is always FREE If you are not 100% satisfied with your purchase, you can return the product and get a full refund or exchange the product for another one, be it similar or not. You can return a product for up to 30 days from the date you purchased it. Any product you return must be in the same condition you received it and in the original packaging. Please keep the receipt. If you have any queries, please contact us via eCRATER. We usually respond within 24 hours on weekdays. Thank you for visiting our eCRATER store!