圆锥角膜早期的角膜地形图改变

摘要

目的 揭示早期圆锥角膜角膜地形图的特征，为早期诊断此病提供参考。方法 收集了本院门诊拟诊为早期圆锥角膜的患者27例52眼。所有患者均行TMS-1角膜地形图测定。结果 80.77%眼角膜最高屈光度部位在正下方或颞下方，最高屈光度在45D以上，散光在2D以上，所有眼平均最高屈光度在47.56D±5.80D，平均散光5.47D±3.80D；角膜非对称性指数(SAI)及角膜规则性指数(SRI)值大于0.5者分别为94%、98%，SAI值平均为2.6±1.9，SRI值平均为1.67±0.94。结论 早期圆锥角膜的测定须兼顾上述综合参数，SAI及SRI值的变化更敏感。%Objective To identify the significant findings of cornealtopography for early keratoconus.Methods Fifty-two eyes of 27 patients in whom the diagnosis of keratoconus were suspected and no slit-lamp evidence of the condition was enrolled. All eyes were evaluated by corneal topography analysis system.Results The highest corneal power of 80.76% eyes was over 45D, while the astigmatism was over 2D; The values of SAI and SRI were over 0.5 on 94% eyes and 98% eyes respectively.Conclusion The values of SAI and SRI were more sensitive to detecting the early keratoconus.