There are many factors known to cause<unk> . Diabetic retinopathy The most common cause found in adults is diabetic retinopathy. Abnormal blood vessels can form in the back of the eye of a person with diabetes. These new blood vessels are weaker and prone to breaking and causing hemorrhage. Diabetic retinopathy accounts for 31.5–54% of all cases of<unk>  in adults in the United States. Trauma Some injuries can cause blood vessels in the back of the eye to bleed. Trauma is the leading cause of<unk>  in young people, and accounts for 12–18.8% of cases in adults. Retinal tear or detachment A tear in the retina can allow fluids from the eye to leak in behind the retina, which causes retinal detachment. When this occurs, blood from the retinal blood vessels can bleed into the vitreous. Retinal tear accounts for 11.4–44% of<unk>  cases. Posterior vitreous detachment As one gets older, pockets of fluid can develop in the vitreous. When these pockets develop near the back of the eye, the vitreous can pull away from the retina and possibly tear it. Posterior vitreous detachment accounts for 3.7–11.7% of<unk>  cases. Other causes Less common causes of<unk>  make up 6.4–18% of cases, and include: *Proliferative sickle cell retinopathy *Macroaneurysms *Age-related macular degeneration *Terson syndrome *Retinal neovascularization as a result of branch or central retinal vein occlusion *Other
Vitreous hemorrhage
Retinal haemorrhage
Intraocular hemorrhage
Cavernous sinus thrombosis
Labyrinthine fistula
Persistent hyperplastic primary vitreous
Posterior vitreous detachment
Chemical eye injury