RISK FREE AFTER-SALE SERVICE - All our computer glasses enjoy 30 Day Money Back Guarantee.You can return the defective products for repairing or exchanging for free at any time (if not man-made damage).Just contact seller by clicking below on our name and then click the ‘ask a question’ button. REDUCE EYESTRAIN & HEADACHE:Wear this blue light blocking glasses women,no more eye fatigue, blurred vision and headache during your computer/ ipad/ tablet/ iphone/ TV watching time. TR90 MATERIAL FRAME - the frame of these blue light glasses are made from TR90 material. TR material makes these computer glasses only half weight of plastic glasses, and two times durable. And these blue light blocking glasses are also constructed with reinforced metal hinges to ensure durability and avoid breaking. BLUE LIGHT BLOCKING LENS - This blue light blocker glasses lens are made from first class materials to make sure it is durable, light weight, blue light blocking and abrasion resistance. Provide 100% UV400 protection and filter harmful blue light, suitable for using when watching TV and looking at screen of a cellphone or computer Game glasses. ATTENTION - The nose bridge size was UPDATED,we are care your voice. For more accuracy, please refer to the frame size. Imported.