I've had these since I was a kid. I always assumed I had a tumor or something and in my typical denialist style, just sorta ignored it. Then in about 2002 or so I did some Googling and found illustrations like this one. I recognized it right away, just as I recognized the topic of this post as soon as I saw the illustration; before I'd read a word.
Funny, that. It seems like such a subjective thing, as it appears only before my eyes and I have no symptoms anyone around me can see. Whenever I read descriptions of ocular migraines, it always feels a bit like someone reached into my mind and printed out the contents.