PURPOSE To assess the precision of a new spectral-domain optical coherence tomographer (SD-OCT)/Placido topographer (MS-39; CSO) and its comparison with a swept-source OCT (SS-OCT) biometer (Argos; Movu, Inc) in patients with cataract. METHODS Fifty-three right eyes from 53 patients were examined by two experienced operators three times using both devices randomly. Employing the within-subject standard deviation (Sw), test-retest variability, coefficient of variation, and intraclass correlation coefficient to evaluate intraoperator repeatability and interoperator reproducibility; the double-angle plots to analyze astigmatism; and Bland-Altman plots and 95% limits of agreement to verify the agreement between devices. RESULTS The SD-OCT/Placido tomographer showed high precision, with coefficient of variation of 0.44% or less, intraclass correlation coefficient of 0.945 or greater for all parameters, test-retest variability of 4.21 µm or less for central corneal thickness (CCT), 0.03 mm or less for anterior chamber depth (ACD) and aqueous depth (AQD), and 0.25 diopters (D) or less for mean keratometry (Km), J0, and J45. The inter-device differences in Km, J0, and J45 were statistically insignificant, whereas the remaining were statistically but not clinically significant. The 95% limits of agreement of CCT, ACD, AQD, Km, J0, and J45 were -3.70 to 15.25 µm, -0.06 to 0.04 mm, -0.06 to 0.04 mm, -0.28 to 0.35 D, -0.27 to 0.26 D, and -0.27 to 0.21 D, respectively. The double-angle plot confirmed the high agreement in astigmatism. CONCLUSIONS For CCT, ACD, AQD, Km, and astigmatism measurements in patients with cataract, the new SD-OCT/Placido tomographer has excellent precision and high agreement with the Argos SS-OCT biometer, and can be used interchangeably. [J Refract Surg. 2021;37(9):616-622.].

中文翻译：

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新型前段光学相干断层扫描仪的精度及其与基于扫描源 OCT 的光学生物计在白内障患者中的比较。

目的 评估新型谱域光学相干断层扫描仪 (SD-OCT)/Placido 地形仪 (MS-39; CSO) 的精度及其与扫频源 OCT (SS-OCT) 生物测量仪 (Argos; Movu, Inc) 的比较) 白内障患者。方法 53 名患者的 53 只右眼由 2 名有经验的操作者随机使用两种装置分别检查 3 次。利用受试者内标准偏差 (Sw)、测试-再测试变异性、变异系数和组内相关系数来评估操作员内的可重复性和操作员间的可重复性；分析散光的双角度图；和 Bland-Altman 图和 95% 的一致性限制来验证设备之间的一致性。结果 SD-OCT/Placido 断层扫描仪显示出高精度，变异系数为 0.44% 或更低，所有参数的组内相关系数为 0.945 或更大，中央角膜厚度 (CCT) 的重测变异性为 4.21 µm 或更小，前房深度 (ACD) 和房水深度 (AQD) 的重测变异性为 0.03 mm 或更小，以及屈光度为 0.25 ( D) 或更少的平均角膜曲率 (Km)、J0 和 J45。Km、J0 和 J45 的设备间差异在统计学上不显着，而其余的在统计学上但在临床上不显着。CCT、ACD、AQD、Km、J0 和 J45 的 95% 一致限为 -3.70 至 15.25 µm、-0.06 至 0.04 mm、-0.06 至 0.04 mm、-0.28 至 0.35 D、-0.27 至 0.26 D、和 -0.27 至 0.21 D，分别。双角度图证实了散光的高度一致性。结论 对于白内障患者的 CCT、ACD、AQD、Km 和散光测量，新型 SD-OCT/Placido 断层扫描仪与 Argos SS-OCT 生物计具有出色的精度和高一致性，并且可以互换使用。[J 屈光手术。2021;37(9):616-622.]。