LASIK is a type of laser operation to the eye meant to minimize or repair difficulties with eyesight. The surgery is performed by ophthalmologists, who are mDs specializing in eye problems. LASIK is generally preferable to photorefractive keratectomy (PRK), as it is not as painful and requires less time for healing. Prior to LASIK surgery, the patient's corneas are evaluated with a computer driven sophisticated scanning device and a map of the cornea is made. This stage of the procedure also detects astigmatism and other irregularities in the shape of the cornea. The surgeon uses this information to find out the location as well as the amount of corneal tissue to be removed during the operation. The surgery is carried out with the person awake, still, the person is usually given a modest sedating drug and anesthetizing eye drops. The operating surgeon operates the laser machines, which do all of the cutting. A flap is sliced 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 destroys tissue without causing damage. Although relatively uncommon, damaging complications do occur with LASIK or non laser forms of eye surgeries. A number of the more typically reported complications of LASIK can include: infection, dry eyes and light sensitive eyes, under or over correction, fluctuating vision, starbursts or halos around lights, doubled vision, and problems with the flap that was produced during the operation. Although LASIK technology is improving quickly, clinical studies have not defined long-term or permanent complications. The eye surgery is irreversible.

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