Abstract:

Objective To investigate the agreement of axial length (AL) measurements between IOLMaster 700 and IOLMaster 500 in postoperative patients. Design Diagnosis test. Participants A total of 109 eyes from 88 postoperative patients in Beijing Tongren Hospital． Methods Postoperative status included LASIK, aphakic, phakiciol, pseudophakic, postvitrectomy, and siliconoil. Measurements of AL examined with IOLMaster 700 and IOLMaster 500 by an experienced technician in the same time. The paired t test, the intraclass correlation coefficient (ICC) and Bland-Altman analysis were used to evaluate the agreements of the AL measurements between the two devices. Main Outcome Measures The AL measurements, the ICC, and Bland–Altman analysis. Results There were significant differences between the results of the two devices in post-LASIK and pseudophakic (P<0.001). Good agreements were indicated by the ICC（0.999 to1.000）and 95%CI（0.998~1.000）. Bland-Altman analysis showed that the maximum absolute values of 95% limits of agreement (LoA) were small (0.014~0.089). Conclusion In postoperative patients, the agreement of AL measurements between IOLMaster 700 and IOLMaster 500 was excellent.

Key words: IOLMaster, optical coherence tomography, axial length, agreement