This is where migraine symptoms become annoying.
Visual issues were part of the predictable prodrome.
I’d go through a visual aura phase that would last about half an hour. I’d have to just sit and wait for it to pass. Scintillating scotoma, I think it’s called. In a pattern of something of a fortification spectrum.
The issue would begin at the fovea, then progress across one half of my binocular field of view. Bilateral.
Did I have an abnormality in my optic chiasm? Probably not.
Certainly I wasn’t having a stroke. I’d have lost much more than that, and with my physical condition and general health, it’s unlikely. I wouldn’t say “athletic”, but I would suppose it’s better than average. Yes, even after The Year Of Hell.
Eh, so the vision — ongoing. Occasional. In time, it became “normal” for me. It also became annoying as hell. I would learn to live with it.
I mean, I’ve been living with low-grade discomfort or low-grade pain for so long that it was effectively a lifetime of normality.