LASIK is a form of laser-guided surgery to the eye designed to correct or at least minimize problems with eyesight. The surgery is carried out by ophthalmologists, who are physicians or MDs specializing in disorders of the eye. LASIK is generally preferable to pRK (photorefractive keratectomy), as it is not as painful and requires less time to heal completely. Prior to LASIK surgery, the patient's corneas are analyzed with a computerized sophisticated scanner and it creates a map of the cornea. This step of the procedure also picks up astigmatism and also other deviations in the shape of the cornea. The surgeon uses this information to ascertain the location as well as the amount of corneal tissue to be removed during the surgery. The surgery is done while the patient is awake and functional, but, the patient is generally given a modest sedating agent and anesthetic eye drops. The surgeon operates the laser machines, which produce all of the incisions. A flap is cut in the cornea, which is the clear front part of the eye, using a blade or laser. Then an excimer laser is used to remodel the cornea. The laser vaporizes tissue without causing damage. Although usually uncommon, some complications do occur with LASIK or any eye surgeries. Just some of the more frequently reported complications of LASIK include: infection, light sensitive or dry eyes, over or under correction, changing vision, halos or starbursts around lights, double vision, and disorders with the flap that was produced during the surgical procedure. Although LASIK technology is improving rapidly, clinical studies have not defined long-term complicating problems. The surgical procedure is irreversible.

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