方法：对白内障超声乳化联合人工晶状体植入术341例418眼行术前术后相关检查，术后采用国际标准视力表行最佳矫正视力检查，进行术后低视力的相关因素分析。

结果：术后1mo低视力发生率为10.3%，发生低视力的危险因素包括合并原发病及晶状体核硬度，合并原发病主要有年龄相关性黄斑变性(48.8%)、糖尿病性视网膜病变(39.0%)、青光眼性视神经病变(7.3%)、病理性近视眼底改变(2.4%)、视网膜分支静脉阻塞合并黄斑水肿(2.4%)。

结论：影响白内障超声乳化联合人工晶状体植入术后低视力的相关因素包括合并原发病及晶状体核硬度。提示我们临床工作中重视术前检查，术中谨慎操作保护视功能。

METHODS: Clinical data of cases with poor vision after cataract phacoemulsification combined with IOL implantation from 341 patients(418 eyes)during Jan.2015 to Jan.2016 in our hospital were collected and logistic correlation analyzed.

RESULTS: The incidences of postoperative low vision were 10.3% for one month after operation. Forty-three eyes were reported low vision, and 41 of 43 the patients with postoperative low vision had fundus oculi disease before operation, which included 20 eyes(48.8%)with age-related macular degeneration, 16 eyes(39.0%)with diabetic retinopathy, 3 eyes(7.3%)with glaucomatous optic neuropathy, 1 eye(2.4%)with pathologic myopia of retinopathy and 1 eye(2.4%)with branch retinal vein occlusion.

CONCLUSION: The associated factors of poor vision after phacoemulsification operation are preoperative eye diseases and the nuclear hardness, and preoperative eye diseases may be the main causes of postoperative low vision. Comprehensive examination should be attached importance to, and be careful in the operation to decrease the harm for visual performance.