Case study! I've been getting mostly-painless migraines for maybe eight years now. An area of my visual field stops reporting data. It doesn't look like anyt

Case study! I've been getting mostly-painless migraines for maybe eight years now. An area of my visual field stops reporting data. It doesn't look like anything, I just get no data. This is a relatively rare form of "aura"; most people who get aura report some kind of positive phenomenon. It starts as a few-degrees-wide field near my focal region; later in the cycle it gets bigger as it moved farther from the focus. I can only locate the region by moving my focal point and watching for bright objects to disappear. I discovered it when trying to figure out why reading was suddenly very difficult. My blind-spot episodes last about 30 minutes. When I first started having them, there was no pain at all. Since then, they've started to be followed by mild headaches, and sometimes by a cognitive stupor. If you read up on migraines, that's consistent enough that I almost wonder if I've tricked myself into adding these symptoms psychosomatically. More generally, I've met lots of people who have migraines who think they don't, because their headaches don't debilitate them. When they also report aura, I tell them to go look up "migraine".