Multipurpose lens – one for dual focus,Pioneers of Hi-Index lens, Allow for visual clarity between two viewing zones. Wider visual field especially advantageou, for distant viewing, Light weight and comfortable, depending on the refractive index and material used, Has 28mm wide segment lens zone for wider and best view. 1.67 Refractive index lens with Aspherical design provides wider viewing compared to ordinary Spherical design, Gives great reduction in centre thickness, edge thickness and weight of the lenses compared to traditional lens.