LASIK is a type of laser-guided eye surgery meant to cure or improve disorders with vision. It is carried out by ophthalmologists, who are physicians or MDs specializing in eye problems. LASIK is usually preferable to photorefractive keratectomy, or PRK, as it is much less painful and requires less time to recover. Prior to having LASIK eye surgery, the patient's corneas are examined with a computer driven sophisticated scanning device and a corneal map is devised. This process also detects astigmatism or other irregularities in the cornea's shape. The surgeon uses this data to determine the amount and location of corneal material to be eliminated during the surgery. The operation is performed while the patient is awake, still, the person is generally given a minor sedative and anesthetizing drops in the eyes. The eye surgeon operates the laser machines, which create all of the incisions. A flap is carved in the cornea using a blade or a laser. Afterwards, an excimer laser remodels the cornea. The laser vaporizes tissue without creating damage to the eye. Although usually uncommon, complications can occur with LASIK or any form of eye surgeries. A number of the more typically reported complications of LASIK include: infection, light sensitive or dry eyes, over or under correction, changing vision, starbursts or halos around lights, double vision, and problems with the flap created during the operation. Although LASIK technology is getting better rapidly, scientists have not defined long-term or permanent complications. The procedure cannot be reversed.

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