Brain disturbance: Ocular migraine is a disturbance of the circulation to the occipital lobe of the brain which is the site of visual information processing. This condition causes attacks lasting from 5 min to up to 2 hours, of greying out of 1/2 of the field of view (or a portion) with shimmering lights and variable patterning. It usually comes without warning and leaves with no trace.
Answered 1/30/2019
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