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is there a difference between advanced surface ablation and sub-Bowmans keratomileusis?

April 26, 2017ablation advanced difference keratomileusis sub-bowman

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is there a difference between advanced surface ablation and sub-Bowmans keratomileusis?

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PURPOSE: To describe the biomechanical and wound healing characteristics of corneas after excimer laser keratorefractive surgery. METHODS: Histologic, ultrastructural, and cohesive tensile strength evaluations were performed on 25 normal human corneal specimens, 206 uncomplicated LASIK specimens, 17 uncomplicated sub-Bowman’s keratomileusis (SBK) specimens, 4 uncomplicated photorefractive keratectomy (PRK) specimens, 2 uncomplicated advanced surface ablation (ASA) specimens, 5 keratoconus specimens, 12 postoperative LASIK ectasia specimens, and 1 postoperative PRK ectasia specimen and compared to previously published studies. RESULTS: Histologic and ultrastructural studies of normal corneas showed significant differences in the direction of collagen fibrils and/or the degree of lamellar interweaving in Bowman’s layer, the anterior third of the corneal stroma, the posterior two-thirds of the corneal stroma, and Descemet’s membrane. Cohesive tensile strength testing directly supported th