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Retinal vein occlusion refers to the closure of the central retinal vein that drains the retina or to that of one of its branches. Retinal vein occlusion (RVO) occurs when the central retinal vein, the blood vessel that drains the retina, or one of its branches becomes blocked.
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Retinal vessel occlusion is a blockage of the blood supply to the retina , the light sensitive membrane in the back of the eye.
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