目的： 利用Itrace视功能分析仪评估区域折射型多焦点人工晶状体的居中性和视轴在人工晶状体的位置以及视远区、视近区在瞳孔区分配大小的改变。方法： 回顾性病例研究。收集2018-01/2019-01在北京爱尔英智眼科医院行超声乳化白内障联合区域折射型多焦点人工晶状体植入患者36例51眼。利用Itrace测量出的人工晶状体中心、视轴、α角、Kappa角、轴位，从而推算出视轴在人工晶状体的位置及瞳孔区视远区与视近区所占比例的改变。结果： 人工晶状体居中性大小为0.217±0.09mm，视轴在人工晶状体的分布为0.217±0.09mm，视轴在视远区及视近区均匀分布，与术后视力≥0.8与<0.8两组之间无差异(P>0.05)。Kappa角的大小为0.187±0.079mm。Kappa角在y轴的位移为0.10±0.06mm，瞳孔的偏移所致视远区与视近区在瞳孔区的大小改变与术后视力≥0.8与<0.8两组之间无差异(P>0.05)。结论： 利用Itrace视功能分析仪测量的人工晶状体居中性及轴位数据可以推算视轴所处的区域以及视远区、视近区在瞳孔区分配的大小，从而辅助评估白内障术后植入区域折射型多焦点人工晶状体的术后视觉质量。

AIM: To evaluate the centration of the SBL-3 multifocal intraocular lens, the size of the distant and near power zone in the pupil area and the area of the visual axis using Itrace visual function analyzer. METHODS: Retrospective case study. From January 2018 to January 2019, 51 eyes of 36 patients underwent phacoemulsification cataract combined with regional refraction multifocal intraocular lens implantation at Beijing Aier-Intech Eye Hospital were enrolled. The centration, visual axis, angle α, angle Kappa and the orientation of the intraocular lens measured by Itrace were used to calculate the position of the visual axis in the intraocular lens and the changes in the proportions of the distant and near power zones in the pupil area. RESULTS: The centration(R)of intraocular lens is 0.217±0.09mm. The distribution of the visual axis in the intraocular lens is 0.217±0.09mm. The visual axis is evenly distributed in the distant and near power zones. There was no statistical significance between the two groups with postoperative visual acuity ≥0.8 and <0.8(P>0.05). The size of the angle Kappa is 0.187±0.079mm. The displacement of angle Kappa on the y-axis is 0.10±0.06mm. There was no statistical significance between the changes in the pupil size of distant and near power zones in the pupil area caused by the deviation of the pupil and the postoperative visual acuity ≥0.8 and <0.8(P>0.05). CONCLUSION: The intraocular lens centration and axial data measured by the Itrace visual function analyzer can be used to estimate the area where the visual axis is located and the size of the distant and near power zones in the pupil area, thereby assisting in evaluating the postoperative visual quality of the regional refraction multifocal intraocular lens implanted after cataract surgery.