HQMGLASSES provides you a variery of glasses such as anti blue light glasses, progressive multifocus reading glasses and photochromism sunglasses.Most electronic devices that have screens—including smartphones, tablets, televisions, computers and e-readers—emit blue light.Increasingly more young adults sleep with their smartphones either next to or in their beds,Playing video games before bed, Reading a book on an e-reader,if you regularly use digital devices in the evenings,If you’d rather not limit screen time,HQMGLASSES progressive multifocus lenses1. The top optical area of the lens used to look far(When walk around).2. The degree of the middle gradually change(Let your eyes adapt more naturally).3. The bottom optical area used to look near(When read books, computers and cellphones ).FDA certification standardHQMGLASSES reading glasses are produced based on customized prescription eyeglasses standard. Accurate reading glasses magnifaction strength offer better vision, see more clearExcellent customer service100% satisfaction guarantee. If you have any issue, please contact with us in priority, We promise exchange or refund