I never had a migraine up until a few months ago, I am 26 y/o. This is almost exactly what my aura does, It happens over a 20 minute period and it is completely circular and the edges are flashy like when you look at a light and look away. And it's only in one eye.
wow. this is exactly like my migraine aura, it's nice to know that i'm not alone in this (this type of aura). if it's o.k., when i eventually get a doc (no insurance...etc), can i show him/her this description/picture?