This first happened 3 years ago, lived in CA, went to neurologist and she said TIA and take aspirin every other day. I moved back to Lexington, KY saw neurologist at KY clinic due to other visual problems also, he said he thought it was lack of blood flow due to strong cough and loss of vision was partial fainting symptom.
But now it happens most every time I cough as I have bad bronchitis/sinuitis and on antibiotics. Have you ever heard of such a persistent problem but doctors don't seem to know what to do about it. Could it be related to migraine problems also which I started to have in early September?