Design Optics by Foster Grant McKay Blue Light Reading Glasses, 2-pack

If you like to read or work on electronic devices, McKay E-Readers are a great option. They have a classic round frame, offered in versatile black and classic tortoise colors. Slim metal temples update this style while adding durability and comfort. The lenses help to filter up to 30% of potentially harmful blue light* and are available in a range of diopters to meet your reading magnification needs. Features: * Combination plastic front with metal temples * Temples feature metal spring hinges with plastic temple tips for added comfort * Patented lens technology filters approximately 30% of potentially harmful blue light.* * Lenses are scratch-resistant * Anti-reflective treatment increases clarity by reducing reflections * Includes a coordinating soft neoprene case *Potentially harmful blue light refers to the 415-455 nanometer range of the visible light spectrum. The percentage represents the average amount of potentially harmful blue light filtered at 5 nanometer increments in this range. Covered under U.S. Pat. No. 8,360,574. Other U.S. and foreign patents pending. Specifications: Brand: Design Optics by Foster Grant Colors: * Shiny black with satin gunmetal temples and shiny black temple tips * Brown tortoise with satin brown temples and brown tortoise temple tips Frame Size: 49-18-140 MM Material: Plastic Metal