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目的 观察和分析角膜塑型术 (Orthokeratology ,OK镜 )后角膜地形图动态变化 ,评价OK镜矫正近视眼 (<-5 0 0D)与角膜地形图变化的关系。方法 对使用OK镜的患者 3 3例 (60只眼 )在治疗前 ,治疗后 7d、 1 4d、 3 0d、 90d及 1 80d作屈光状态检查和角膜地形图检查。结果 治疗前后视力、角膜不规则指数 (CIM)、角膜表面形状系数 (SF)与角膜平坦K值有显著性差异 (P <0 0 5 ) ,治疗前后角膜陡峭K值差异无显著性 ;3mm区域平坦K值有差异 ,陡峭K值无差异 ;5mm区域平坦K值无差异 ,陡峭K值无差异 ;7mm区域平坦K值无差异 ,陡峭K值无差异。结论 OK镜是临床上比较满意的非手术治疗轻、中度近视眼的一种方法 ;计算机辅助的角膜地形图检查在OK镜治疗的随访中是必要的检查
Objective To observe and analyze the dynamic changes of corneal topography after orthokeratology (OK), and to evaluate the relationship between OK myopic correction of myopia (<-500D) and the change of corneal topography. Methods Thirty-three patients (60 eyes) with OK lens were examined for refractive status and corneal topography before treatment, 7d, 14d, 30d, 90d and 180d after treatment. Results Before and after treatment, visual acuity, corneal irregularity index (CIM), corneal surface shape coefficient (SF) and corneal flat K value were significantly different (P <0 05), before and after treatment the corneal steep K value was no significant difference; 3mm area Flat K values are different, steep K value no difference; 5mm flat flat K value no difference, steep K value no difference; 7mm flat flat K value no difference, steep K value no difference. Conclusions OK microscopy is a clinically satisfactory non-surgical treatment for mild to moderate myopia; a computer-assisted examination of the corneal topography is necessary for follow-up of OK microscopy