1.499 lenses are lighter than glass, far less likely to shatter, and have the optical quality of glass. Resin lens is tough and resists scratching, heat and most chemicals. It is the clearest lens material in common use on the Abbe scale at an average value of 58.It is welcomed in South America and Asia, also HMC and HC service are available.Resin lens is actually better optically than Polycarbonate, It tends to tint, and hold tint better than other lens materials. Tags: 1.499 single vision lens, 1.499 resin lens