•分支静脉阻塞的研究是一个多中心、随机对照临床试验设计来回答几个问题关于分支静脉阻塞并发症的管理。本报告地址的问题,“外围能分散氩激光光凝术预防新血管形成的发展?”和“边缘散射氩激光光凝术可以预防玻璃体出血?”To answer the first question, 319 eyes were assigned randomly to either a treated or an untreated control group. Comparing treated patients with control patients (average follow-up time, 3.7 years), the development of neovascularization was significantly less in treated eyes (P=。009, log rank test). To answer the second question, 82 eyes were assigned randomly to either a treated or untreated control group. Comparing treated patients with control patients (average follow-up time, 2.8 years), the development of vitreous hemorrhage was significantly less in treated eyes (P=。005, log rank test). Although the Branch Vein Occlusion Study was not designed to determine whether peripheral scatter treatment should be applied before rather than after the development of neovascularization, data accumulated in this study suggest that外围散治疗后应用发展的新血管形成,而比以前发展的新生血管形成。因为玻璃体出血的发生减少了外围散射氩激光光凝术,我们建议激光光凝术对分支静脉阻塞病人谁开发了新血管形成和满足本研究的合格标准。