方法： 采用前瞻性研究。收集我院2020-12-01/12-30拟行白内障超声乳化吸除联合人工晶状体植入手术的年龄相关性白内障患者30例60眼。术前暗室中适应10min后，分别应用iTrace、Lenstar 900和IOL Master 700生物测量仪测量Kappa角和Alpha角。分析三种仪器的差异性和一致性。

结果：iTrace、Lenstar 900和IOL Master 700的Kappa角测量结果分别为0.25±0.13、0.19±0.11、0.21±0.11mm(F=1.903，P=0.155)，Alpha角测量结果分别为0.31±0.11、0.36±0.16、0.36±0.14mm(F=2.999，P=0.052)。三种仪器Kappa角大于0.5mm的比例分别为3%、2%、2%，Alpha角大于0.5mm的比例分别为5%、15%、22%。Kappa角和Alpha角分布主要是在双眼的颞侧，相对于双眼的Kappa角分布，Alpha角颞侧分布比率更高，且iTrace测量的Alpha角分布较Lenstar 900和IOL Master 700沿水平线分布也更加紧密。每种仪器测量得到的Kappa角和Alpha角之间均呈正相关关系(r=0.2941、0.4082、0.5137，P=0.0226、0.0012，P<0.0001)，三种仪器Kappa角测量结果两两间一致性好，Alpha角测量结果两两间一致性较差。

结论：白内障患者术前进行多焦点人工晶状体植入决策时，Lenstar 900、IOL Master 700和iTrace之间测量的Alpha角结果一致性较差，临床应用时需参考对比多种仪器测量结果。如白内障患者术前无法得到Alpha角的数据时，三种仪器测量得到的Kappa角均可以为多焦点人工晶状体植入决策提供有用的信息。

METHODS: Prospective study. Totally 60 eyes of 30 patients with age-related cataract from December 1 to December 30, 2020 were collected. After adapting to 10min in the darkroom before operation, the angle Kappa and angle Alpha were measured with iTrace, Lenstar 900 and IOL Master 700 biometric instruments, respectively. The difference and consistency of the three instruments were analyzed.

RESULTS: The results of angle Kappa measurement of iTrace, Lenstar 900 and IOL Master 700 were 0.25±0.13, 0.19±0.11, 0.21±0.11mm(F=1.903, P=0.155). The results of angle Alpha measurement of the three instruments were 0.31±0.11, 0.36±0.16, 0.36±0.14mm(F=2.999, P=0.052). The proportion of angle Kappa of the three instruments greater than 0.5mm is 3%, 2% and 2%, and the proportion of angle Alpha greater than 0.5mm is 5%, 15% and 22%. The distribution of angle Kappa and angle Alpha is mainly in the temporal side of both eyes. Compared with the angle Kappa distribution of both eyes, the temporal distribution ratio of angle Alpha is higher, and the distribution of angle Alpha measured by iTrace is closer than that of Lenstar 900 and IOL Master 700 along the horizontal line. There was a positive correlation between angle Alpha and angle Kappa measured by each instrument(r=0.2941, 0.4082, 0.5137; P=0.0226, P=0.0012, P<0.0001). The consistency of angle Kappa measurement results of three kinds of instruments was good, while that of angle Alpha measurement results was poor.

CONCLUSION: When making the decision of multifocal intraocular lens implantation before cataract surgery, the consistency of angle Alpha measured by Lenstar 900, IOL Master 700 and iTrace is poor, so it is necessary to compare and refer to the results of various instruments in clinical application. When the data of angle Alpha could not be obtained before cataract surgery, the angle Kappa measured with the three instruments could provide useful information for multifocal IOL implantation decision.