Chou JC, et al. - This retrospective study was performed to examine optic disc hemorrhages (DH) correlated with primary open-angle glaucoma by quantifying their geometric profile and comparing their densitometry with hemorrhages from retinal vein occlusions (RVO) and retinal macroaneurysms (MA), which presented with venous and arterial sources of bleeding, respectively. Findings revealed that DH had densitometry profiles comparable to MA and different from RVO. The data thereby suggested that DH in glaucoma had an arterial origin.