Davis L J, Dresner M S
St. Louis University, Department of Ophthalmology, Bethesda Eye Institute, MO 63110.
CLAO J. 1991 Jul;17(3):191-6.
The Marco Model-1 keratometer was compared for accuracy and precision with the El Hage Corneal Topography System (EH-270). Five consecutive readings of three steel calibration balls (40.50 D, 42.50 D, 44.75 D), one PMMA hemisphere (48.00 D), and 14 eyes (seven patients) were obtained using each instrument. Keratometry was found to be statistically more accurate and precise for measuring the two steeper steel balls and the hemisphere. Values obtained from patients demonstrated excellent correlation between keratometry and the EH-270. Although more variability was observed in measuring corneas greater than 43.00 D using the EH-270, we found these differences to be clinically acceptable. The EH-270 has a number of clinical advantages.
将Marco Model-1角膜曲率计与El Hage角膜地形图系统（EH-270）的准确性和精密度进行了比较。使用每种仪器对三个钢制校准球（40.50 D、42.50 D、44.75 D）、一个聚甲基丙烯酸甲酯半球体（48.00 D）以及14只眼睛（7名患者）连续进行了五次测量。结果发现，在测量两个较陡的钢制球和半球体时，角膜曲率测量在统计学上更准确、精密。从患者那里获得的值显示角膜曲率测量与EH-270之间具有极好的相关性。尽管使用EH-270测量大于43.00 D的角膜时观察到了更多变异性，但我们发现这些差异在临床上是可以接受的。EH-270具有许多临床优势。
