What is the treatment recommendation for branch retinal vein occlusion according to the Branch Retinal Vein Study Groups?

Answer
In patients with branch retinal vein occlusion of at least 3 months 
duration and a macular oedema which reduces the vision to 6/12
or worse, argon laser photocoagulation is useful in improving the
vision provided the fluorescein angiography shows intact foveal vasculature.

What is the recommendation of Branch Retinal Vein Study Groups for retinal ischaemia secondary to branch retinal vein occlusion?

Answer
Sectorial panretinal photocoagulation is useful in reducing the incidence
of neovascularization in patients with retinal ischaemia. However, as the visual loss resulting from neovascularization is not severe, prophylactic 
photocoagulation is not necessary (ie. photocoagulation at the time of neovascularization).

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