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目的了解先天性上睑下垂的角膜表面屈光力的改变.方法采用计算机辅助的角膜地形图分析系统,对先天性上睑下垂的角膜进行摄影分析,同时选30只眼作为对照.结果先天性上睑下垂的角膜地形图表现为上方象限较平坦,下方象限变陡峭.SAI值明显高于正常对照组(P＜0?05).结论先天性上睑下垂可导致眼角膜表面形状不规则散光“,”Abstract Objective To understand the refrative changes in the surface of congemitat ptosis patient′s cornea. Methods Using a computer assisted photokeratography to map cornea of 30 ptosis eyes and also examined 30 normal eyes as control. Results This shudy showed that corneal SAI value in congenital ptosis group is prominent higher than the control group (P