TECHNOLOGY: Spectacle Lenses Essilor Debuts Essential Blue Series Lenses By Staff Monday, June 11, 2018 12:00 AM DALLAS—Essilor of America is launching the Essential Blue Series brand of blue light filtering lenses which provide a combination of Harmful Blue Light protection and clarity all in one lens. The lenses deliver up to three times more protection from harmful blue light than standard clear lenses, according to Essilor. Essilor defines harmful blue light as the blue-violet wavelengths between 415 and 455 nm on the light spectrum that are believed to be most toxic to retinal cells. Emerging research has pointed to a possible link between exposure to these wavelengths and long-term vision issues such as age-related macular degeneration. Essential Blue Series lenses allow for exposure to beneficial blue light—which Essilor defines as 465 to 495 nm on the light spectrum—which has been shown to play an important role in the sleep/wake cycle, memory, cognitive performance and other factors that contribute to general wellness. With Essential Blue Series, blue light protection in a clear lens will be available in all Essilor progressive and single vision lenses, comprising 100 percent of the company’s core product portfolio.