Sometimes when I run I see a strobing white circular light in front of my face. It is pretty faint and goes away after I cool down. It is also very inconsistent. It happened a couple of times on longer runs (10+ miles) many years ago, but is happening more regularly now and on runs that are 5ish miles.
I read some information suggesting that it could be some kind of migraine, but I don't have a headache or anything.
Does anyone know anything about this?