Toric contact lenses are often the best choice for contact lens wearers with an astigmatism, because they're specifically designed to address the problem. The special shape of a toric lens creates different refractive, or focusing, powers that can help correct either a corneal or a lenticular astigmatism.

Which lens is used to correct astigmatism?

Astigmatism correction today is based on the use of special toric contact lenses. These lenses may have toric surface either on the front or the back side of the lens. Contact lenses with a toric front surface are capable of correcting corneal and lenticular astigmatism of up to 4.5 D.

Which lens is used to correct astigmatism concave or convex?

A cylindrical lens has different powers in the vertical and horizontal axes. Thus, light passing through a cylindrical lens does not focus at one point, but forms two foci, one for the horizontal and the other for the vertical. Cylindrical lenses may be convex, concave or mixed. They are used to treat astigmatism.