SANTA CLARA, Calif., May 28 -- VISX Inc. has received approval from the US Food and Drug Administration (FDA) for its CustomVue laser vision correction procedure. CustomVue uses VISX's WaveScan diagnostic system to evaluate patients for nearsightedness, farsightedness and astigmatism and other imperfections and to generate a treatment plan for a CustomVue procedure, VISX said. The FDA approval allows for WaveScan diagnosis and CustomVue treatment of patients with nearsightedness and astigmatism. 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