LASIK is a type of laser-guided operation to the eye intended to improve difficulties with vision. The operation is performed by ophthalmologists, who are medical physicians who specialize in eye disorders & diseases. LASIK is generally a preferred alternative to pRK surgery, as it is less painful and requires less time to recover completely. Before having LASIK surgery, the patient's corneas are evaluated with a computer controlled sophisticated scanner and a map of the cornea is created. This step of the procedure also discovers astigmatism and additional problems in the shape of the cornea. The surgeon uses this data to find out the amount as well as location of corneal material to be eliminated during the operation. The operation is done with the person awake, all the same, the patient is typically given a minor sedative and anesthetic drops in the eyes. The eye surgeon operates the laser machines, which make all of the incisions. A flap is sliced in the cornea using a blade or laser. Subsequently, an excimer laser is used to remodel the cornea. The laser destroys tissue without inducing damage. Although relatively uncommon, complicating problems might occur with LASIK or other laser or non laser eye surgeries. A few of of the more frequently reported complications of LASIK include: infection, light sensitive and dry eyes, under or over correction, changing vision, halos or starbursts around lights, double vision, and troubles with the flap that was produced during the surgery. Although LASIK technology is improving very rapidly, research has not completely determined long-term or permanent damage. The eye surgery is irreversible.

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