Lately I've been having visual migraines too. Sometimes they are a prelude to the pain, other times it's just the visual symptom (called a scintillating scotoma.) My Imitrex doesn't seem to do anything for them. I was surfing around Google and found an illustration of one. Mine looks like the one on the bottom of the picture, except mine starts at the 12 o'clock position and curves around like a backwards "C" to the 4 o'clock position, it sort of undulates the way heat waves come off the pavement in summertime. It usually lasts between 20 minutes to a half hour and sort of just drifts off toward the two o'clock direction until it fades away. If the headache starts, it comes just about the time that the ocular migraine is starting to fade away, about 20 minutes after the light show starts.
