Vitreous hemorrhage has an incidence of 7 cases per 100,000, which makes it one of the most common causes of acutely decreased vision. The mechanisms of vitreous hemorrhage fall into three main categories: abnormal vessels that are prone to bleeding (DIABETES), normal vessels that rupture under stress, (POSTERIOR VITREOUS DETACHMENT) or extension of blood from an adjacent source.
Photo: "Vitreous Hemorrhage".
During a posterior vitreous detachment, vitreous traction on the retinal vasculature may compromise a blood vessel, especially at the firm attachments. This may happen with or without a retinal tear or detachment. However, vitreous hemorrhage in the setting of an acute symptomatic posterior vitreous detachment should alert the clinician that THE RISK OF A CONCURRENT RETINAL BREAK IS QUITE HIGH (70-95 %).