ROSSO 1.56 Blue Block Crizal lenses are made from 1.56 index material with a medium refractive index. These lenses are equipped with special Blue Block technology to block harmful blue light emitted from screens, reducing eye strain and protecting eye health. Crizal technology protects the lenses from glare, provides scratch resistance, and creates high optical clarity. These features make ROSSO 1.56 Blue Block Crizal lenses an ideal choice for those who spend a lot of time in front of screens and seek a high-quality visual experience.