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目的：对传统超声乳化术中的劈核技术进行改良，评估其安全性和术后效果。方法将年龄相关性白内障160眼随机分为劈核改进技术超声乳化术组及传统核分瓣超声乳化术组，每组80眼，记录手术时间、乳化时间、能量等数据，术后观察患者视力、角膜水肿程度、房水闪辉等指标。结果对术中数据进行 Mann-Whitney U 检验，两组间手术时间（P ＝0．000）、乳化时间（P ＝0．011）、能量（P ＝0．005）差异均有统计学意义。两组间最佳矫正视力（BCVA）术后1 d（P ＝0．003）、3 d（P ＝0．005）差异有统计学意义，角膜状态术后1 d（P ＝0．005）、3 d（P ＝0．004）、7 d（P ＝0．044）差异有统计学意义，房水闪辉术后1 d（P ＝0．004）、3 d（P ＝0．011）、7 d（P ＝0．026）差异亦有统计学意义。两组间术中并发症、术后其他并发症差异无统计学意义（P ＝0．560）。结论劈核改进技术超声乳化术较传统核分瓣超声乳化术对眼组织损伤更少，是一种安全有效的改良手术。“,”Objective To evaluate the safety and efficacy of the improved chop nucleus technique in phacoemulsifica-tion.Methods A total of 160 eyes with age-related cataract were divided into the improved chop nucleus phacoemulsi-fication group and the conventional chop nucleus phacoemulsification group,each group had 80 eyes.The operation time,emulsifying time,energy and other data were recorded,and postoperative visual acuity,corneal edema,aqueous flare and other indicators were observed.Results By Mann-Whitney U test,there were significant difference between the two groups in operation time (P =0.000),emulsifying time (P =0.011)and energy (P =0.005).Also,there were significant difference in the best corrected visual acuity (BCVA)after surgery 1 d (P =0.003)and 3 d (P =0.005),in the corneal state after surgery 1 d(P =0.005),3 d(P =0.004)and 7 d(P =0.044),and in the aqueous flare after surgery 1 d (P =0.004),3 d(P =0.011)and 7 d(P =0.026).By χ2 test,the intra-operative complications and postoperative complications had no statistical significance.Conclusion The improved chop nucleus phacoemulsifi-cation compared with the traditional chop nucleus phacoemulsification for eye tissue leads to less damage,is a safe and effective surgery.