Migraine headaches are familiar and generally treatable ailments. Less understood are migraine auras or scotoma, visual distortions--sometimes accompanied by headache and sometimes not--that make it difficult, sometimes impossible, to see clearly. Migraine auras can be frightening, disorienting, even incapacitating. Richard Grossinger, who has suffered from them himself, here presents a helpful guide to the subject that maps the terrain, describes the various forms migraine auras can take, charts his personal experiences with them, and offers informed suggestions for homeopathic and other treatments.