Amaurosis fugax caused by a branch retinal artery embolus
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A 77-year-old man presented to the ophthalmology clinic reporting three episodes of blurred vision in his right eye, each lasting approximately 5 minutes, during the past hour. He had been taking statins for hypercholesterolemia for the past 5 years, and his ocular history was unremarkable. On examination, the bilateral visual acuity and intraocular pressures were normal. The examination of the anterior segment was unremarkable. The dilated fundus examination revealed a visible motile embolus in the right superior branch of the retinal artery bifurcation; the motile embolus followed the arterial pulsation circle. The diagnostic workup was notable for 80% stenosis of the right internal carotid artery. The patient underwent successful carotid endarterectomy...

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