Occlusion of a retinal artery is rapid event that threatens vision in the involved eye. When blood flow is not re-established within several hours, permanent damage to the retina will develop. The disorder can develop from a blood clot which obstructs the retinal artery or from a fragment of a diseased artery which breaks off and becomes lodged in the small arteries leading to the retina.
Causes of Retinal Artery Occlusion
Either a blood clot or an embolism from a distant artery may block the retinal artery. The early stages of glaucoma, where pressure is increased within the eye, may be a risk factor for developing retinal vessel occlusion. Diseases that lead to athereosclerosis, such as hypertension and diabetes may increase the risk, Disorders that increase the viscosity of the blood, such as polycythemia, can increase the risk.
Signs and Symptoms of Retinal Artery Occlusion
Rapid loss of vision in one eye is the hallmark of this disorder. It is painless and may vary from blurred vision to complete blindness.
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Medical Content Last Updated on 07/12/2008
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