摘要
目的比较Lanstar900、前节相干光断层扫描(AS-OCT)和A型超声三种角膜测厚仪检测近视眼中央角膜厚度的差异。方法分别用Lanstar900、AS-OCT和A型超声对角膜厚度进行检测,并将测量值进行统计学分析。结果 Lenstar900测得中央角膜厚度为(538.58±25.623)μm;AS-OCT测得中央角膜厚度为(541.96±25.257)μm;A型超声测得中央角膜厚度为(534.93±26.042)μm。两两配对t检验显示,AS-OCT与A型超声测得中央角膜厚度值差异有统计学意义(t=2.252,P=0.013)。AS-OCT与Lenstar900测得中央角膜厚度值差异无统计学意义(t=1.091,P=0.139)。Lenstar900与A型超声测得中央角膜厚度值差异无统计学意义(t=1.161,P=0.124)。三种测厚结果显示高度正相关(P<0.001),其中相关系数r最高的是Lanstar900-A型超声为0.988,均高于Lanstar900-AS-OCT的相关系数(0.954)和AS-OCT-A型超声的相关系数(0.953);从相关系数来看三种仪器的相关程度很高。其回归方程如下:AS-OCT(μm)=35.414+0.941X Lanstar900(μm);AS-OCT(μm)=47.750+0.924X A型超声μm);Lanstar900(μm)=18.468+0.972X A型超声(μm)。结论在检测中央角膜厚度方面,三者检测方法有较高的相关性,Lanstar900与A型超声可相互替代使用。
Objective To compare the accuracy of 3 different systems, Lanstar900,AS-OCT and Super A, for the measurement of central corneal thickness in myopic eyes .Methods We used Lanstar900,AS-OCT and Super A to meas-ure the corneal thickness and analyze the results in myopic eyes .Central corneal thickness was 538.58 ＆#177;25.623μm when measured with Lanstar900,（541.96 ＆#177;25.257） μm when measured with AS-OCT, and 534.93 ＆#177;26.042 μm when meas-ured with Super A.Paired t tests showed significant difference between AS-OCT and Super A （ t =2.252, P =0.013）, but not between AS-OCT and Lanstar90.0（ t =1.091, P =0.139）.Results From these 3 systems were highly correla-ted （ r =0.988 between Super A and Lanstar 900, r =0.954 between Lanstar900 and AS-OCT, and r =0.953 between AS-OCT and Super A;P ＆lt;0.001）, indicating consistencies among the systems .The relationships between any two meas-uring systems were：AS-OCT=35.414＋0.941X Lanstar900;AS-OCT=47.750＋0.924X Super A; Lanstar900=18.468＋0.972X Super A.Conclusion The 3 systems tested in this study showed good consistency in measuring central corneal thickness in myopic eyes .Especially, results from Lanstar900 and Super A are highly correlated , suggesting that these 2 methods are exchangeable for clinical use .
出处
《临床眼科杂志》
2014年第6期486-488,共3页
Journal of Clinical Ophthalmology
