Vision Correction Surgery
When glasses or contact lenses are inconvenient, not tolerated, or unsatisfactory for optical or cosmetic reasons, vision correction (refractive) surgery may help. Not everybody is a suitable candidate.
The goal of such surgery is to change the focus power of the eye safely and predictably without causing new problems. The usual approach is either to alter the shape of the cornea or else to augment or replace the natural lens by inserting an artificial lens inside the eye.
Only a limited amount of tissue can safely be removed when reshaping the cornea by laser eye surgery. For eyes with higher refractive errors, that are unsuitable for laser, or if there is early sign of cataract, refractive lens surgery is generally preferred. Advances in lens surgery mean that it is now the preferred option for very many people.