The efficacy of anti-vascular endothelial growth factor (VEGF) therapy for branch retinal vein occlusion (BRVO) is shown, but its effect on retinal sensitivity is not fully investigated. The purpose of this study is to compare the changes in retinal sensitivity after ranibizumab therapy or combination therapy of ranibizumab and laser photocoagulation in eyes with BRVO.

Inclusion Criteria:

• Treatment naive patients of branch retinal vein occlusion with visual acuity of less than 1.0 and macular edema of more than 250 micrometers in foveal thickness.

Exclusion Criteria:

• Patients with history of treatment for branch retinal vein occlusion, possibility of pregnancy, allergy for ranibizumab, intraocular infection, or severe inflammation will be excluded.