为探讨激光治疗视网膜分支静脉阻塞的最佳时间，５５例５８只眼以发病３个月为界限，分别进行了早期、晚期氩激光光凝治疗。随访６个月～２年，对早、晚期两组光凝治疗后出血吸收的速度、新生血管及其引起玻璃体出血的发生率、黄斑水肿的改善以及视力改善等，进行了比较。结果表明，早期光凝治疗，对促进出血吸收、缩短病程、减少并发症和改善预后是有效的 In order to explore the best time for laser treatment of branch retinal vein occlusion, 55 cases of 58 eyes were treated with early and late argon laser photocoagulation respectively. The follow-up ranged from 6 months to 2 years. The rate of bleeding absorption, the incidence of vitreous hemorrhage, the improvement of macular edema and the improvement of visual acuity after photocoagulation in the early and late stages were compared. The results show that the early photocoagulation treatment, to promote bleeding absorption, shorten the course of the disease, reduce complications and improve the prognosis is effective