Gingster, I used to have the full blown migraines (hormone related) with sickness, tunnel vision and incredible pain. They began when I was 12 and, thank Heavens, ended when I was about 50, with the menopause. Triggers were travel, hunger and (strangely) relaxation, Friday evenings quite often.
Since then, I've had the visual migraines - a complete breeze by comparison. They're pain free but my sight is impaired by them. All I have to do is sit or lie down for about 20 minutes, then I'm fine.
I have regular checks at the optician, just in case, as the symptoms are similar to a detached retina.