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本文应用计算机辅助的角膜地形图系统TMS-1和角膜曲率计TOPCONOM-4同时测定了200例(278眼)的角膜地形图和中央角膜屈光状态。比较了角膜地形图的模拟角膜曲率SIMK值和角膜曲率计的垂直和水平屈光度。结果显示,白内障术前组116例150眼的SIMK平均值分别为44.22D(垂直轴)和44.26D(水平轴),角膜曲率计的中央屈光度垂直轴平均为44.16D,水平轴为44.23D。统计学处理表明,2种组方法的结果之间差异无显著性(P>0.05),第2种术后组67例90眼的SIMK平均值分别为46.37D(垂直轴)和43.06D(水平轴),角膜曲率计的中央屈光度垂直轴平均为46.09D,水平轴平均为42.88D,统计学处理二种方法的结果之间差异无显著性(P>0.05)。研究提示,角膜地形图系统的模拟角膜曲率SIMK值和角膜曲率计的屈光度无论在白内障手术前还是在手术后其结果是一致的,临床应用具有同等的价值。但是,当角膜中央屈光度异常范围小于3毫米,角膜混浊,角膜严重不规则散光时,角膜曲率计不能满足临床需要。而计算机辅助的角膜地形图系统则具有极大的诊断及检测价值。眼科学报 1994;10:85—89。
In this paper, 200 cases (278 eyes) of corneal topography and central corneal refractive status were simultaneously measured by TMS-1 computerized topography system and TOPCONOM-4 corneal curvature meter. Simulated corneal curvature SIMK values of corneal topography and corneal curvature of the vertical and horizontal diopters were compared. The results showed that the average SIMK values of 116 eyes (150 eyes) in preoperative cataract group were 44.22D (vertical axis) and 44.26D (horizontal axis) respectively. The average central axis of corneal curvature was 44.16D and the horizontal axis was 44.23D. Statistical analysis showed that there was no significant difference between the two groups (P> 0.05). The average SIMK values of 67 eyes (90 eyes) in the second postoperative group were 46.37D (vertical axis) and 43.06D Axis). The average central vertical corneal curvature was 46.09D and the horizontal axis was 42.88D. There was no significant difference between the two methods (P> 0.05). The study suggests that simulative keratometric SIMK values of corneal topography system and corneal refractive power of corneal curvature meter have the same value in clinical application both before and after cataract surgery. However, when the central corneal refractive error range is less than 3 mm, corneal opacity, severe corneal irregular astigmatism, keratometer can not meet the clinical needs. The computer-assisted corneal topography system has great diagnostic and testing value. Journal of Ophthalmology 1994; 10: 85-89.