Retrograde flow in left ophthalmic artery on carotid doppler

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Retrograde flow in left ophthalmic artery on carotid doppler

Kevi
Radiology

Transient Left Eye Blindness after Exercise This 73 year old male with a history of transient left eye blindness after exercise had a carotid Doppler with evaluation of the ophthalmic arteries. What is the abnormality and what is the anatomic reason?

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