Pentacam三维眼前节分析仪测量近视眼角膜厚度的可靠性分析

Reliability analysis of the measurement of corneal thickness in myopic eyes with the Pentacam Scheimpflug system

目的:比较Pentacam三维眼前节分析系统、OrbscanⅡ角膜地形图系统、A型超声测厚仪在近视眼患者角膜厚度中的测量,为临床应用提供理论依据。方法:分别利用上述3种测量方法对在我院行LASIK手术的患者进行角膜最薄点厚度的测量并进行统计学分析。结果:分别采用Pentacam,OrbscanⅡ,A超角膜测厚仪对56例56只近视右眼进行角膜厚度测量,测得角膜厚度的平均值分别为(547.04±3.65)μm、(535.41±32.93)μm和(539.46±29.15)μm。将3种不同仪器测得的角膜厚度平均值进行方差分析,F=1.992,P=0.140,差异无统计学意义;三种仪器测量角膜厚度有很好的线性相关;Penta-cam仪测量角膜厚度具有较好的重复性。结论:用Pentacam三维眼前节分析系统进行LASIK术前角膜厚度的测量,其结果准确、全面、方便,具有较好的临床应用价值。

AIM： To assess the accuracy and variability of corneal thickness in myopic eyes obtained by ultrasound pachy-meter, OrbscanⅡ system and Pentacam Scheimpflug imaging system. METHODS： First, Pentacam system, OrbscanⅡ system and A-scan ultrasonic pachymeter were used to measure the corneal thickness on 56 myopic cases（56 right eyes）undergoing laser in situ keratomileusis（LASIK）;Then, the results were compared. RESULTS： The value of corneal thickness measured by Pentacam, OrbscanⅡ and A-scan ultrasonic pachymetry was 547.04±3.65μm, 535.41±32.93μm and 539.46±2915μm respectively; there was no significant difference between the results with one-way ANOVA; these three kinds of instruments of measuring corneal thickness had a good linear correlation; Pentacam system had good repeatability in the measurement of corneal thickness. CONCLUSIONS： The Pentacam system offers an accep-table method for evaluating corneal thickness, which is useful in corneal refractive surgery.