Refractive surgery is a method of modifying the refractive state of the eye at the time of surgery. If the patient, due to genetics or other factors, has a predisposition to increased refraction, it may be the case that it increases over the years and indeed, after an evaluation, it could be operated again.
Refractive surgery includes several elective procedures. Procedures involving alteration of the cornea are collectively referred to as keratorefractive surgery, refractive keratoplasty, or corneal refractive surgery. They also include placing a phakic intraocular lens (IOL) implant in front of the lens or replacing the lens by exchanging refractive lenses.
LASIK is one of the most popular vision correction procedures used today. With this procedure, vision is corrected by reshaping the corneal tissue below the surface of the eye. A "flap" is created on the surface of the cornea, which is then flipped back while the surgeon uses a laser to treat or reshape the deeper layers of the cornea. The flap is then folded back into place where it joins without the need for stitches.