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--20 to 23 age of refractive disorder patients and no change of corrective glasses or contanct lenses power from last two or at least one year.
--High Myopia more than corrective power -4D.
--Poor or non co-operative patient for LASIK.
--Deep set eyes.
--Small lid or palpebral fissure.
--Standard pachymetry masurement.
--Asymetric astigmatism.
--Inability to get good suction for LASIK.
--Thin corneal, which isn't suitable for LASIK operation.