Clinical observation of laser photocoagulation for branch retinal vein occlusion

Objective To investigate the clinical efficacy of laser photocoagulation for branch retinal vein occlusion.Methods Changes of visual acuity,ocular fundus photograph and fundus fluorescein angiography(FFA) were observed before and after treatment in 37 cases(37 eyes),who were diagnosed with branch retinal vein occlusion and treated with laser photocoagulation.FFA was rechecked at 3 months,6 months and 12 months after laser photocoagulation.And laser photocoagulation was taken again if there was no perfusion area or neovascularization was not extinct.Results Visual acuity improved in 27 eyes(72.97%),unchanged in 8 eyes(21.63%) and decreased in 2 eyes(5.41%).After laser photocoagulation for 1 to 3 times,FFA showed that leakage at macular area was disappeared,non-perfusion area extincted and neovaucularization was not formed.There were 4 eyes with neovascularization before laser treatment and completely extinceted after treatment.There was 1 eye with vitreous hemorrhage at 8 months after treatment and 12 eyes with hardness exudation.Conclusion Laser treatment can promote the absorption of hemorrhage and exudation,lessen macular edema,protect visual function,decrease the formation of neovascularization and effectively prevent complications like proliferative vitreoretinopathy and secondary neovascular glucoma.