Blue light material is injected into the lens, wearing a non-reflective blue halo.Does not interfere with sight.Reduce eyestrain & Better sleep The enlarged side shield protect the eyes and resist external pollution. Ergonomically, the one-piece Cover fit better to protect the eyes. PACKAGE INCLEDED 2*Blue Light Blocking Bifocal Reading Glasses 2*Storage Pouch INSTRUCTION OF USE DO NOT Clean the lens by Water.Soft cloth will be suggest to use for cleaning to protect the fog coating on the lens. DO NOT Use Alcohol Chemicals,chlorinated degreasing fluids or abrasive to clean any part of glasses. Do not use in high temperature environment (>60¡æ), it may cause the lens cracked.