WINTER PARK, Fla., Oct. 3 -- LaserSight Inc. said that the FDA has approved its LaserScan LSX precision microspot scanning excimer laser system for the LASIK treatment of myopia (nearsightedness) with and without astigmatism. The approval is for a range of treatment of refractive errors up to -6.00 diopters manifest refraction spherical equivalent (MRSE) with or without a refractive astigmatism up to 4.5 diopters of cylinder. 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