retinal artery occlusion

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retinal artery occlusion n. blockage of an artery supplying blood to the retina, usually as a result of thrombosis or embolism. branch r. a. o. blockage of one of the branches of the central retinal artery, which results in visual field loss in the area of the retina supplied by the occluded vessel. central r. a. o. blockage of the central retinal artery, which enters the eye at the optic disc, usually resulting in sudden painless loss of vision.

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