Foster Grant Eyezen employs two new technologies that provide a heightened layer of protection against digital eye strain:1. A patented lens coating that blocks approximately 29% of potentially harmful blue light*2. SmartFocus Technology which provides a slight enhancement to the lower portion of the lens to help the eyes stay relaxed while using digital devices*Harmful blue light refers to the 415-455 nanometer range of the visible light spectrum. The percentage represents the average amount of harmful blue light blocked at 5 nanometer increments in this range. Eye/Bridge/Temple: 52/17/140 Best For Face Shapes: Round, Oval