目的：探讨白内障术后低视力的主要原因。 方法：2009/2011年740眼白内障行白内障超声乳化摘除+IOL植入术，回顾性分析术后低视力48眼的临床资料。 结果：引起术后低视力的原因：糖尿病视网膜病变累及黄斑占22.9％(11／48)，高度近视眼视网膜病变占20.8％(10／48)，年龄性黄斑变性占18.8％（9/48)，视神经萎缩占16.8%（8/48），其它占20.8％(10／48)。 结论：白内障超声乳化摘除+IOL植入术后低视力主要原因是视网膜及视神经病变，但手术对有眼底疾病的白内障仍有重要临床意义。

AIM:To investigate the causes of low vision after cataract surgery. METHODS:During 2009-2011 740 eyes underwent phacoemulsification and intraocular les (IOL) implantation.The clinical data of 48 eyes of low vision after cataract surgery were retrospectively analysed. RESULTS:The reasons of low vision after cataract surgery: diabetic retinopathy involving the macula lutea accounted for 22.9% (11/48), high myopia retinopathy accounted for 20.8% (10/48), age-related macular degeneration accounted for 18.8% (9/48), optic atrophy accounted for 16.8% (8/48), and the other 20.8% (10/48). CONCLUSION:The main reasons of low vision after phacoemulsification and IOL implantation are retinopathy and optic neuropathy, but the operation itself still has important clinical significance.