3D角膜地形图与A超角膜测厚仪测量角膜厚度的比较研究

A Comparative Study of Corneal thickness measurement between 3D Corneal Topography with A-type ultrasonic Corneal Pachymeter

目的用SIRIUS 3D角膜地形图眼前节分析系统和A超角膜测厚仪测量中央角膜厚度,并比较其结果差异。方法连续选择拟行准分子激光手术者366例(732只眼),分别应用SIRIUS 3D角膜地形图和TOPCON-3000A超仪测量中央角膜厚度,比较两者测定值及其相关性。结果 A超所测角膜厚度平均(534.02±1.099)μm,SIRIUS3D角膜地形图测量角膜厚度平均(533.20±1.068)μm,二者比较差异有统计学意义(t=2.468,P=0.000),两种测量方法所测结果呈显著正相关(r=0.954,P=0.000)。结论 SIRIUS 3D角膜测厚仪和A超角膜测厚仪各有其优势及劣势,应两种方法结合使用,准确评估角膜厚度,以保证手术安全性。

Objective To compare the difference in measurement of central corneal thickness （CCT） by SIRIUS 3D corneal topography of anterior segment analysis system and A-type ultrasonic corneal pachymeter.Methods A total of 366 patients （732 eyes）,who would undergo excimer laser surgeries,were continuously selected.The CCT was measured respectively by Sirius 3D corneal topography and TOPCON-3000 A type ultrasonic corneal pachymeter,and the measured value and their correlation were compared.Results The mean CCT values were （534.02 ± 1.099） μm measured by A-type ultrasonic corneal pachymeter,and （533.20 ± 1.068） μm measured by SIRIUS 3D corneal topography,and the differences were statistically significant （t =2.468,P ＜ 0.001） ; 2.The results measured by the two methods showed a high correlation （r =0.954,P =0.000） ; there were positive correlations in results measured by the two methods （r =0.954,P =0.000）.Conclusion SIRIUS 3D corneal topography and A-type ultrasonic corneal pachymeter have their own advantages and disadvantages.To evaluate the corneal thickness exactly,the two methods should be combined to guarantee the operative safety.