The anti-reflective hardened plastic lens is shatterproof, prevents glare, provides a clearer view and the wearer can see beautifully into the eyes. Now the standard and most common choice.
Other available materials include mineral (glass) and the mechanically resistant materials polycarbonate and trivex.
For higher diopters, choose a lens with a higher refractive index. The lens is thinner and gives the glasses a better aesthetic appearance.