The Bryen Blue Light ReadersThe Bryen Blue Light Reader Glasses Strength: +1. 25 The Blue Planet Eco Process Blue Light Readers will keep eye strain and fatigue at bay with our premium blue light filtering lenses. The lenses are built with Blue Light protective technology to prevent eye strain and other harmful effects from the light emitted by digital screens by filtering 40% or more blue light rays emitted by digital devices. Lens Width (mm): 51 Bridge Width (mm): 19 Temple