A retinal artery occlusion occurs when the central retinal artery or one of the arteries that branch off of it becomes blocked. This blockage is typically caused by a tiny embolus (clot) in the blood stream. The occlusion decreases the oxygen supply to the area of the retina nourished by the affected artery, causing permanent vision loss.
Signs and symptoms of Retinal Artery Occlusion
- Transient loss of vision prior to the artery occlusion (in some cases)
- Sudden, painless and complete loss of vision in one eye (in central artery occlusion)
- Sudden, painless, partial loss of vision in one eye (in branch artery occlusion)