Tsilimbaris M K, Vlachonikolis I G, Siganos D, Makridakis G, Pallikaris I G
Department of Ophthalmology, School of Health Sciences, University of Crete, Greece.
Refract Corneal Surg. 1991 Sep-Oct;7(5):368-73.
We examined 92 normal eyes using Javal Ophthalmometer and Corneal Analysis System (EyeSys) intending to compare the keratometric readings obtained by these two instruments. Dioptric power and location at flatter and steeper meridians, keratometric astigmatism values, and average central keratometric power were measured in the central cornea of all eyes. Statistical analysis showed significant differences in flatter meridians' mean power values (mean difference = 0.13 D, P = .008), mean keratometric astigmatism values (mean difference = -0.20 D, P = .001) and steeper meridians' location (mean difference = 7 degrees, P = .0001). There was no significant difference in steeper meridians' mean power values (mean difference = -0.06 D, P = .38), flatter meridian location (mean difference = 5.9 degrees, P = .07), and mean average central keratometric power (mean difference = 0.03 D, P = .471). Clinically meaningful difference was observed only in keratometric astigmatism readings of eyes with keratometric astigmatism higher than 1.50 D (mean difference = -0.84 D). For all the other parameters measured, the differences between the two instruments readings were clinically acceptable.
我们使用贾瓦尔角膜曲率计和角膜分析系统（EyeSys）对92只正常眼睛进行了检查，旨在比较这两种仪器所获得的角膜曲率测量值。测量了所有眼睛中央角膜的屈光力以及较平子午线和较陡子午线处的位置、角膜曲率散光值和平均中央角膜屈光力。统计分析显示，较平子午线的平均屈光力值存在显著差异（平均差值 = 0.13 D，P = 0.008）、平均角膜曲率散光值（平均差值 = -0.20 D，P = 0.001）以及较陡子午线的位置（平均差值 = 7度，P = 0.0001）。较陡子午线的平均屈光力值（平均差值 = -0.06 D，P = 0.38）、较平子午线位置（平均差值 = 5.9度，P = 0.07）以及平均中央角膜曲率屈光力（平均差值 = 0.03 D，P = 0.471）均无显著差异。仅在角膜曲率散光高于1.50 D的眼睛的角膜曲率散光读数中观察到具有临床意义的差异（平均差值 = -0.84 D）。对于所测量的所有其他参数，两种仪器读数之间的差异在临床上是可接受的。
