Dallas-Essilor of America Inc. now offers Definityprogressive lenses through its network of laboratories and otherselect labs nationwide. Definity lenses feature Dual Add, apatented technology that maximizes available design space of thelens, minimizing peripheral distortion and providing a smoothertransition between all distances.
Dallas-Essilor of America Inc. now offers Definity progressive lenses through its network of laboratories and other select labs nationwide. Definity lenses feature Dual Add, a patented technology that maximizes available design space of the lens, minimizing peripheral distortion and providing a smoother transition between all distances.
"Essilor is pleased to offer eye-care professionals (ECPs) and their patients access to Definity and Dual Add technology through Essilor Laboratories," said John Carrier, president, Essilor Laboratories of America. "For progressive lens wearers, this lens offers a wider field of vision, the least amount of blurriness, and a smooth transition between distances to see near, far, and in between. These are critical lens attributes for many with presbyopia."
Definity applies some of the progressive power to both the front and back surfaces of the lens. By splitting and slightly rotating the power distribution between the front and the backside, unwanted astigmatism is minimized. The Dual Add design also allows for a wider intermediate zone with an even realignment between the distance and near zones. Sphere and cylinder powers of the prescription are optimized by using aspheric/atoric curves.