Retinal infarctions, or eye strokes, are usually caused by a blood clot blocking a blood vessel that delivers fuel and oxygen to the optic nerve. Sudden, painless vision loss in one eye is the key sign, but an eye stroke may also cause blurry vision, blind spots, or a loss of peripheral vision, or may cast a gray hue over everything you see.
Go to the emergency room if you notice any of these signs. Clot-busting drugs may help restore blood circulation in the eye if given within 2 to 4 hours after symptoms start.
If you have an eye stroke, you should be evaluated further. Having one hikes your risk for another.
Source: Consumer Reports on Health May 2018
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