For many years I only had the visual symptoms, never any headaches. An Ocular Migraine occurs when the blood vessels spasm, reducing circulation to the Visual Cortex of the brain. I had mine frequently for 11 or so years, up to several times a week, each episode lasting about
45 minutes, with an occasional doubling for 90 minutes. There's a book by Doctor Oliver Sacks about
the many forms of migraines, producing, if memory serves me correctly, mosaic migraines, Lilliputian migraines, and more. /en.m.wikipedia.org/wiki/Migraine_(book)
The first medication that slowed the frequency of the migraines was Ergotrate. The pharmacist found that my use of that medication was so unusual that he wouldn't fill the prescript
ion without speaking with the doctor. This medication drastically reduced the number of migraines.
I also tried Caffergot, it's ergotamine and caffeine. This gave me the worst ocular migraine I ever had and rather confirms the vascular spasm (contraction) principle of these migraines.
I went from Ergotrate to Inderal LA, (Long acting Propranolol), it was similar or slightly better than Ergotrate in effectiveness. But I had to take 240 mg/day.
Years later, actually concurrently with, I had seizures, and after 19 years the seizures were correctly diagnosed and treated. The interesting part is the migraines vanished upon taking Dilantin (Phenytoin) at the therapeutic level. Never expected that. My neurologist said there can, at times, be a fine line between migraines and seizures. Apparently so.
Vascular spasm wise, I also have twice lost the vision in one eye. Scary stuff. Lasted less that 7 minutes each time, had a total work-up, the conclusion is vascular spasm of the artery supplying the eye.
Last but not least, I had a Basilar Migraine at work. My eyes crossed, I was dizzy beyond belief, and I was looking for a place to fall, I was holding on to the wall inside and outside of an
open door, sandwiched between my arms and I felt like consciousness was fading. I was taken to the hospital by ambulance, although I had returned to normal in less than 10 minutes, and received extensive testing there and again at when I saw my neurologist. I do not recommended this type of migraine to anyone ;-)