【摘要】 目的 :探讨准分子激光角膜切削术后角膜厚度变化 ,及角膜厚度变化与角膜雾状混浊 (Haze)的关系。方法 :采用美国DGHA型生物测量仪测量PRK术前及术后 1、3、6、12与 2 4月的角膜中心厚度 ,显微裂隙灯下观察PRK术后角膜雾状混浊的情况。结果 :角膜中心厚度术前与术后 1、3、6、12、2 4月之间有极显著性差异 (P <0 0 0 1) ,术后 1月分别与 3、6、12、2 4月之间有显著性差异 (P <0 0 5 ) ,3、6、12、2 4月之间两两比较无显著性差异 (P>0 .0 5 ) ;本组病例Haze均在 1级以下。结论 :PRK术后角膜中心厚度在 3个月时趋于稳定 ;PRK术选择 - 6 .0 0D以下 ,其切削深度小于 80 μm是安全的。更多还原

【Abstract】 Objective: To investigate the change of corneal thickness after photorefractive keratectomy (PRK) and the relationship between the corneal thickness and Haze. Methods: The corneal thickness was measured before and 1,3,6,12 and 24 months after PRK with an DGHA biometer; the grades of Haze after PRK were examined with a slit lamp biomicroscope.Results: The corneal thicknesses before and 1,2,6,12 and 24 months after operation showed very significant difference ( p <0.001). There were also significant difference between the corneal thicknesses 1 month after the operation and 3,6,12 and 24 months after the operation ( p <0.05) , but it had no significant difference among 3,6,12 and 24 months after operation ( p >0.05) . The Haze of all cases were under grade 1 . Conclusions: The corneal thickness became stable 3 months after PRK. PRK is safe when myopia is less than 6.00D and the cutting depth is less than 80um.更多还原