Recently, I suffered what is called a silent migraine, where your eyesight goes strange. Bright lights obscure your vision and are present, even when your eyes are closed. I could also feel the onset of a headache.
After about 30 minutes, I remembered that the herb feverfew is said to help migraines so I got up and took four capsules. Within minutes, the light that had been steadily increasing in mass and brightness, all but vanished, and within 10 minutes, I was back to normal. I experienced no further effects.
I've tried this cure a few times now, and it does certainly shorten the duration and severity of the migraine.