三种不同仪器测量角膜曲率的对比观察

目的 :通过角膜曲率计 ,电脑验光仪 ,角膜地形图仪 (计算机辅助的角膜镜摄影 )三种不同仪器测定角膜曲率的对比观察 ,了解三种不同仪器的性能和优缺点 ,为临床适用仪器提供参考。方法 :选取来我院检查的屈光不正患者 ,年龄 13～ 40岁 ,平均年龄 2 0 5岁 ,66人 ,13 0眼 ,验配前用三种不同仪器测量角膜曲率 ,每人每种仪器测量三次 ,记录角膜曲率的最大值、最小值、角膜散光度数、散光轴位。结果 :结果显示三种仪器所测的角膜曲率的最大值、最小值 ,散光度数和平均角膜曲率值 ,都没有显著性差异 (P >0 0 5 ) ,三种仪器所测的散光轴位差 ,也没有显著性差异。结论 :本实验研究结果提示 ,角膜曲率计、电脑验光仪、角膜地形图仪检测中央角膜曲率的精确率相似。但各有优缺点 ,曲率计较简单 ,便宜、易普及 ,但较主观 ;电脑验光仪可同时测定眼的总屈光状态及晶体散光 ,可大量快速普查人群 ;角膜地形图仪较客观反映全角膜的平、陡地形情况 ,数据精密 ,图形直观 ,但价格昂贵 ,不易普及。

Clinical observation of three kinds of measurement devices of corneal curvature

To compare the capability of three kind of devices,keratometer,autorefracter and corneal topography in the measurement of corneal curvature. Methods:Three devices,keratometer,autorefracter and cornea l topography,were used to measure the corneal curvature in 130 eyes of 66 patients with ametropia.The ages of the patients were between 13 to 40 years old (average age:20.5 years old).The maximum and minimum of corneal curvature,the degree and the axes of corneal astigmatism were recorded. Results:There were no statistically significant difference s among the measuring data from 3 different devices on the items of maximum,minimum and mean values of corneal curvature,as well as the degree of corneal astigmatism,and the axes values of corneal astigmatism. Conclusions:There is the same accuracy in measuring the ce ntral corneal curvature with three kinds of devices,Keratometer,Autorefracter an d Corneal topography,although the 3 means are different in other aspects.