Astigmatism Treatment
Unless it is extreme, astigmatism can be compensated for satisfactorily with eyeglasses or contact lenses. If your eyeglass or contact lens prescription contains three parts rather than one, your eyecare practitioner has found some astigmatism in one or both of your eyes. A prescription with three parts looks like this:
-2.75 -1.25 x 90.

The first part indicates your main spherical correction, meaning the amount of power (in diopters) required in a lens to sharpen your visual acuity to an acceptable level, usually 20/20. In this example, the person has myopia and requires a negative (concave) lens to correct it.

Part two shows the extent of the astigmatism in diopters. Again, the minus sign means a concave lens is needed.

Part three is the axis (in degrees) of the cylinder required to bend certain light rays to compensate for the cornea's oval shape.

Many people with astigmatism believe that they can't wear contact lenses or that only rigid contact lenses (RGPs, also called GP lenses) can correct astigmatism.