Health

I've been getting them for at least 20 years. For a couple years the headache followed, but not since. They even did MRI then, but no cause found. I will say a do feel a little off, kinda a bit out of body, not sure how to describe, for an hour or so afterward.
These start as a blur in the center of vision that slowly becomes what I can best describe as a lit up circular saw blade that expands and expands in size until it moves out of the periphery of the entire eye visual field. That lasts about 30 minutes. I used to get them about every month or two, but now several times per month.
One time only, I had an experience along with it that was something made me think it might have been a TIA because I really had trouble speaking or finding words, and trying to read normal words did not make any sense to me even though I could tell they were normal words. Scary!
An interesting thing I read is that some postulate that Van Gogh suffered from these visual aura migraine s, giving rise to some of his artistic styling - who knows!?