Acute-Onset Vitreous Hemorrhage of Unknown Origin before Vitrectomy: Causes and Prognosis

Figure 1

Causes of acute-onset vitreous hemorrhage of unknown origin according to age. Among patients aged ≤60 years, retinal break was the main cause of acute-onset VH of preoperatively unknown origin. Moreover, the proportion of cases of acute-onset VH of preoperatively unknown origin that was due to retinal break declined with age. In contrast to retinal break, the proportion of vitreous hemorrhage due to wAMD increased with age. Among patients aged >60 years, RVO was the most common cause of acute-onset VH of preoperatively unknown origin. RVO, retinal vein occlusion; wAMD, wet age-related macular degeneration.