Nine cases of hemispheric retinal branch vein occlusion (HRBVO) are discussed retrospectively after identification from among 94 cases of branch vein occlusion. The high incidence of simple chronic glaucoma (close to that found in central vein occlusion cases), the presence of vein-vein disc collaterals and the visual prognosis make it important to distinguish HRBVO cases from other branch vein occlusions.