LASIK is a type of laser-guided operation to the eye meant to correct or at least minimize problems with vision. The surgical procedure is carried out by ophthalmologists, who are physicians or MDs specializing in disorders of the eye. LASIK is commonly a preferred alternative to pRK surgery, as it is less painful and requires less time to heal completely. Prior to having LASIK surgery, the patient's corneas are analyzed with a computerized scanning device and it makes a map of the cornea. This process also picks up astigmatism or other deviations in the shape of the cornea. The eye surgeon uses this data to ascertain the location as well as the amount of corneal material to be removed during the operation. The surgery is performed while the person is awake and alert, however, the person is often given a minor sedating agent and anesthetic eye drops. The eye surgeon operates the lasers, which produce all of the cutting. A flap is carved in the cornea, which is the clear front part of the eye, using a blade or laser. Later, an excimer laser is used to remodel the cornea. The laser destroys tissue without creating injury to the eye. Although usually uncommon, some complications do occur with LASIK or any type of eye surgeries. A few of of the more typically reported complications of LASIK typically include: infection, dry or light sensitive eyes, over or under correction, fluctuating vision, starbursts or halos around lights, double vision, and troubles with the flap made during the operation. Although LASIK technology is improving very rapidly, scientists have not completely defined long-term complications. The lASIK procedure is irreversible.

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