The blue light emanating from LEDs, smartphones and other screens is made of harmful waves located between 415 and 455 nanometers which speed up the ageing of the eye and cause sleep disorder. The Tradition protection glasses reduce the amount of HEV (High-Energy Visible) light hitting the eye and therefore instantly improve the contrasts and limit eye pressure, while preserving your visual health. The features of the Read Loop lenses will also have an effect on your circadian rhythm. CE Certificate. Neoprene protection case included.