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If you are referring to a hemorrhage in the vitreous
( middle of the eye) , then it is due to formation of new blood vessels in the retina and on the surface of the optic nerve. Common causes for retinal neovascularisation are diabetes ( diabetic retinopathy
) , central retinal vein occlusion , radiation therapy to the eye, sickle cell disease. These new vessels may rupture and cause a bleed into the thick gel in the middle of the eye called vitreous. A vitreous hemorrhage causes sudden reduction in vision and it resolves on its own by 6 weeks to 6 months.Vision improves gradually as the hemorrhage resolves.
The other conditions where new vessels appear in the choroid ( inner layer of the eye), called choroidal neovascularisation and is most often seen in age related macular degeneration ( ARMD). The treatment consists of an intravitreal injection of Avastin
( which regresses new vessels). Visual recovery has been found to be substantial with this injection.Repeat doses may be needed depending on the response.
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