LASIK is a form of laser eye operation intended to fix issues with sight. The operation is performed by ophthalmologists, who are physicians who specialize in disorders of the eye. LASIK is generally preferable to photorefractive keratectomy, or PRK, as it is much less painful and requires less time for healing. Before having LASIK eye surgery, the patient's corneas are analyzed with a computer driven scanner and the cornea is mapped out. This stage of the procedure also spots astigmatism as well as additional deviations in the shape of the cornea. The operating surgeon uses this information to calculate the amount as well as location of corneal material to be eliminated during the surgery. The surgery is carried out while the person is awake and alert, however, the person is typically given a minor sedating drug and anesthetizing eye drops. The eye surgeon operates the laser machines, which make all of the incisions. A flap is cut in the cornea, which is the clear front part of the eye, using a laser or blade. Then an excimer laser is used to remodel the cornea. The laser destroys tissue without creating injury to the eye. Although usually uncommon, complications or damage might occur with LASIK or any form of eye surgeries. Some of the more frequently reported complications of LASIK include: infection, dry or light sensitive eyes, under or over correction, changing vision, halos or starbursts around lights, double vision, and issues with the flap that was created during the operation. Although LASIK technology is improving quickly, studies have not proven long-term complicating problems. The eye surgery cannot be reversed.

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