In opthalmoplegic migraine, lateralized pain (often around the eye) is accompanied by nausea, vomiting, and diplopia (double vision).

Migraines are also known as vascular headaches. The exact cause of a migraine is unknown, although evidence suggests involvement of the blood vessels of your head. They usually begin in the early morning or during the day with intense, gripping pain on one side of the head that may gradually spread. It reaches the peak of severity in minutes to an hour or two, and...