This can be an aura of migraine( something that occurs before headache) or may be an indicative of serious cardiovascular pathology( hypertension ...) if the sudden blackout comes like a curtain falling over eye it indicates more towards cardiovascular problem and if this loss of vision is related to headache on the same side of head then it can be a mograine aura
Next Steps
Seek a ophthalmologist and get a cardiovascular disease ruled out. If migraine not resolving meet neurologist tonrule out intracranial lesion
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Answered2017-07-28 08:07:58
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