Higher index lenses are chosen for their lightweight comfort and attractiveness. High and mid index lens materials are lighter in weight and thinner than their regular glass or plastic counterparts. The benefit is that if you have a strong prescription, you are no longer forced into "Milk-bottle" lenses.

Just about everyone can get attractive spectacle lenses that complement their appearance, rather than detracting from it. As well as being lighter in weight and thinner than their regular lenses they are often much tougher and safer. An ideal choice for rimless and semi-rimless frame designs.
Ultra flat & thin lenses lenses reduce weight and thickness even more effectively than our flat & thin lenses. CyberSpecs recommend you select these lenses on prescriptions over +/-400. Our very thin lenses are high index and aspheric. Our very thin lenses are anti-reflection coated as standard