This article summarizes the results of the BRAVO and CRUISE trials, two randomized multicenter studies in patients with macular edema secondary to branch and central retinal vein occlusion, respectively. Randomization was 1:1:1 to 0.3 mg of ranibizumab, 0.5 mg of ranibizumab or placebo. Monthly injections were administered for 6 months followed by a 6-month observation period in which treatment on an on-demand (PRN) basis was applied with 0.5 mg ranibizumab. Patients in the control group were also eligible for 0.5 mg ranibizumab treatment in the observation period. The results showed a significant anatomical and visual improvement in both treatment groups 7 days after the intravitreal injection. PRN treatment with monthly follow-up maintained the visual improvements achieved after the first 6 months of treatment. Patients in the control group who received PRN treatment after the first 6 months showed an anatomical improvement similar to that in the treatment groups but less visual improvement.