电脑验光仪、角膜曲率计、检影验光测量散光的比较

Comparison of computer optometer,keratometer and retinoscope in measurement of astigmatism

目的:比较电脑验光仪、角膜曲率计和检影验光检查角膜散光三种方法。方法:采用电脑验光仪、角膜曲率、检影验光三种方法对屈光不正患者169例(338眼),进行检查。结果:本组病例中散光度数以3.50D以下为主,顺规性散光125例(250眼),占74.5%。逆规性散光44例(88眼),占25.5%。三者测出散光轴位比较,散光轴位基本相同,其中以电脑验光最准,差异无显著性(P>0.05)。三者测出散光度数比较,差异有非常显著性(P<0.01)。结论:电脑验光、检影验光对散光轴位和度数测量各有优点、验光中相辅相成避免误差,是一种好的工作方法。

AIM： To compare three methods of astigmatism measurement by computer optometer, keratometer and retinoscope respectively. METHODS： A total of 169 cases （338 eyes） with astigmatism were measured by computer optometer, keratometer and retinoscope respectively. The examination results were summarized and compared. RESULTS： In the present study, the astigmatism degree of most cases was lower than 3.50D. 125 cases （250 eyes） had astigmatism with the rule, making up 74.5%, and 44 cases （88 eyes ） had astigmatism against the rule, constituting 25.5%. There was no significant difference in the position of astigmatic axis between three methods of measurement （ P 〉 0. 05 ）. With regard to astigmatism degree, there existed significant difference between three types of measurements （ P〈0.01 ）. CONCLUSION： Computer optometer, keratometer and retinoscope had their own merits and defects in measurement of astigmatism. They should complement each other to provide accurate evidence for vision correction in clinical work.