Blue Light Blocking: reduces eye fatigue, filtering out blue light from all the screen time our eyes receive each day Premium Polycarbonate: technology that provides a sturdier frame Anti-Scratch Aspheric Lenses: keeps lenses scratch resistant, thinner and light weight Sizing: Lens width: 50mm Bridge: 21mm Temple: 142mm Available in 4 Colors Tortoise|Gold Hunter Green|Gold Red |Gold Dark Teal| Gold ALEXA | R-7075-C1-BLB Tortoise |Gold | Blue Light