IOL Master与Pentacam对角膜曲率及前房深度测量的比较

目的比较IOL Master与Pentacam测量角膜曲率和前房深度的差异。方法纳入166例（332只眼）正常眼,分别采用IOL Master、Pentacam测量角膜曲率（K1、K2）和前房深度（ACD）与角膜中央厚度（CCT）之和。应用配对t检验比较两种仪器测量平均角膜曲率（K）[K=（K1＋K2）/2]及ACD与CCT之和的差异及相关性。结果 IOL Master和Pentacam测得的K值分别为（43.49±1.41）D（,43.39±1.40）D,差异有统计学意义（P〈0.001）,测得的ACD与CCT之和分别为（3.78±0.25）mm（、3.80±0.31）mm,差异没有统计学意义（P=0.316）。两种仪器的测量结果均有显著相关关系,相关系数分别为r=0.991,P〈0.001;r=0.721,P〈0.001。结论 IOLMaster和Pentacam均可较准确的测量正常眼的角膜曲率与前方深度,两种仪器在临床应用上可相互替代。

Comparison of keratometry and anterior chamber depth measurements taken with the IOL Master and Pentacam

Objective To compare the difference of keratometry and anterior chamber depth(ACD) measured by the IOL Master and Pentacam.Methods A total of 166 cases(332 eyes) was involved.Keratometry(K1,K2)、anterior chamber depth(ACD) and corneal center thickness(CCT) were taken with the IOL Master and Pentacam respectively.Paired t tests were performed to compare the difference and correlation of mean keratometry K=(K1+K2)/2 and the sum of ACD and CCT between the two instruments.Results The mean K value was(43.49±1.41)D for IOL Master,and(43.39±1.40)D for Pentacam.There was statistically significant difference in K value(P<0.001).The sum of ACD and CCT was(3.78±0.25)mm for IOL Master,(3.80±0.31)mm for Pentacam.NO statistically significant difference(P=0.316) was found.Relative high correlation of results measured by IOL Master and Pentacam were revealed,r=0.991,P<0.001;r=0.721,P<0.001,repectively.Conclusion IOL Master and Pentacam can measured keratometry and ACD of normal eyes accurately.The two instruments can be interchangeable in clinical application.