How Corneal Modification Works

A common goal of all corneal modification procedures is to alter the curvature of the cornea so that incoming light is refracted at an angle that allows it to focus precisely on the retina. This may eliminate the need for eyeglasses or contact lenses, or at least reduce the power of prescription lenses needed for clear vision.

Most corneal modifications are used to treat nearsightedness (myopia) and astigmatism. However, procedures for treating farsightedness (hyperopia) have recently become available.