I was talking to an eye surgeon in Colchester c 1990. I mentioned I'd read that people who had not had migraine by the time they were 50, were unlikely to ever have it. He responded by saying that wasn't true, evidenced by the stream of people coming into his 'office' with post 50s migraine symptoms.
(His name was Julian something, but when I goo'd for a reminder, I was astonished to find a slew of Julians that had gone into that profession. Not one was my man - well, he'd be 80 odd now.)
Indeed, the zig-zag type seems almost to be a 'late onset' problem from my limited knowledge. Despite being marked by the characteristic saw-tooth pattern, there are still quite large patches of total blindness for part of the episode.
Doug. In my posts of old I talk about triggers like chocolate and cheese. Also about deep underlying worry. I personally think the latter is the cause and the former a possible trigger.
I hope you don't get it again, but if it comes back do try to do some tests to determine just where the aura is. Classical migraine is normally in both eyes.
With eyes close, one can still see the aura. It wouldn't surprise me to find this made the eyes feel odd. Spasm/tension can account for a lot of symptoms. Indeed, I think it might be just that acting on the walls of blood vessels that causes the whole problem in the first place.
It only takes the brain to order an emergency squirt of a relaxant to explain a lot of symptoms - from loss of memory in localized areas, to numbness of fingers etc. Having saved the day with the relaxant, it then gives the patient symptoms that in a bad case, make them wish it hadn't bothered.
Such a relaxant would by its very nature have to be quick acting and powerful. Very easy to see it might cause some collateral effects.