青少年近视眼角膜地形图的临床分析

Clinical analysis of corneal topography in adolescent myopia patients

目的 :探讨青少年近视眼角膜地形图特点。方法 :对 2 36例 46 3眼青少年近视眼患者采用日本TopconKR 710 0P角膜彩色地形图自动验光仪进行检测 ,对检测结果进行统计分析。结果 :① 46 3眼角膜地形图中圆形 6 7眼 ,占 14.47% ;椭圆形 35眼 ,占 7.5 6 % ;不规则形 16眼 ,占 3.46 % ;各种蝴蝶结形角膜地形图共有 34 5眼 ,占总眼数 73.92 %。②各种角膜地形图眼的屈光度、角膜厚度、角膜直径、眼轴、眼压等差异均无统计学意义。③蝴蝶结形组与圆形角膜地形图组比较 ,其角膜垂直K值、角膜散光度、总散光度差异有统计学意义 (P <0 .0 1)。结论 :①青少年近视患者的各种角膜地形图形态与其角膜屈光度、角膜直径、角膜厚度、眼压等无明显差异。②当角膜有散光时 ,地形图可呈现蝴蝶结形 ,蝴蝶结形的轴向与角膜循散光、逆散光。

Objective:To reveal the topography characteristics for corneal morphology and to figure out the rules of distribution for corneal refraction.Methods:463 eyes of 236 adolescent myopia patients were evaluated using computer assisted videokeratography (Topcon KR-7100P Japan).Results:14.47% of corneal topography areas were round, 7.56% were oval, and 3.46% were irregular, 345 eyes had a bow tie pattern (73.92%). A t test did not reveal any significant differences in corneal refraction, corneal thickness, eye axis and IOP among the four patterns. There were significant differences in vertical K, corneal astigmatism, or total astigmatism when bow tie and round patterns were compared using a t test.Conclusion:The morphology in corneal topography had no correlation to corneal refraction, corneal diameter, corneal thickness or IOP. When astigmatism exists, corneal topography may have a bow tie pattern, and the axis of this pattern corresponds to the axis of with the rule astigmatism and against the rule astigmatism.