ImportedPolycarbonate lensLens width: 52 millimetersLens height: 47 millimetersANTI BLUE LIGHT LENS- AOMASTE square anti blue light eyeglasses can reduce blue light by 90%, relieve eye fatigue, dryness and decreased vision,protect your eyes from daily life and electronic productsCLASSIC FASHION DESIN - Our anti eye strain glasses use high quality composite,classic half frame design fit various faceCOMFORTABLE TO WEAR - When you play mobile games or computer it,can reduce glare , filter harmful blue ray radiation also it have lightweight,everything is to make you wear more comfortable,enjoy your digital timeBETTER SLEEP - Equipped with advanced blue light blocking lens, can fight eye fatigue, reduce headaches, and make you to enjoy a quiet deep sleepRELIABLE SERVICE: AOMASTE committed to providing more high quality glasses and better service for you. If you have any questions, please feel free to contact us, we will reply you within 24 hours. Product Description