The effects of laser eye surgery generally last for life, but a small percentage of patients might experience regression and therefore benefit from an enhancement or secondary procedure.

Laser eye surgery can treat hyperopia, myopia, astigmatism, and presbyopia. In general, we can treat up to minus 10 dioptres of myopia, up to plus six dioptres of hyperopia, and up to six dioptres of astigmatism. People who have higher prescriptions than this can sometimes be treated by laser eye...

The usual choice of procedure is LASIK, with a minority of patients having PRK. Middle-aged patients in their 40s and 50s often request treatment to assist with a loss of near vision. This is known as presbyopia and requires the use of reading glasses.

PTK is a minor surgical therapeutic treatment that uses an excimer laser to treat mainly diseases of the surface of the corneal or corneal injury, by removing a small outer layer of tissue from the cornea. It is normally used after more traditional treatments have failed.