Aspheric plus lenses can be made with much flatter curves, so there is less bulging of the lens from the frame. This gives the eyewear a slimmer, more flattering profile. It also makes it possible for someone with a strong prescription to wear a larger selection of frames without worry of the lenses being too thick.
High-index glass lenses also have thinner edges, but high-index glass is heavier than conventional glass, so there is not as much weight savings with glass as there is with plastic lenses. Lightweight lenses are even more of a benefit for farsighted prescriptions, which can make conventional lenses very heavy.
Trivex lenses are lightweight, durable, and a great choice for rimless frames, children's eyewear and anyone who wants safe, comfortable glasses. Trivex is one of the lens materials most recommended for children's eyewear, including protective eyewear for sports.