REDUCE EYESTRAIN - Enjoy your digital time without worrying about eye fatigue, blurred vision, or headaches. ^^ ANTI BLUE LIGHT - Block 90% of blue light, relieving eye fatigue, dryness, and vision issues. ^^ BETTER SLEEP - Reduce eye strain and headache, so you can enjoy a restful deeper sleep. ^^ VINTAGE CATEYE STYLINGThis style comes in three color options: classic black, crystal, and tortoise. Featuring spring hinges, it fits any face shape perfectly. As a non-prescription blue light blocking glasses, it's an ultimate choice for women. ^^ LIFETIME WARRANTY - We provide a worry-free lifetime warranty and friendly customer service.