Description,Describes the physiological development of an ocular migraine, and goes on to describe the experience, showing various symptoms. Notes the possibility of ocular migraines leading to classic migraines.
An ocular migraine occurs when blood vessels in part of the brain responsible for vision temporarily spasm. Ocular migraines cause a disturbance in one's vision, known as an aura, which typically lasts from several minutes, to about an hour. An aura may appear as a blank spot, flickering colored lights, zig-zag lines, or a blurred area of vision like looking through heat waves. After the episode of visual distortion is over, a person may feel completely back to normal. If this is the case, no treatment is needed, even if a person experiences multiple episodes over time. Other people may experience a kind of altered sense of awareness after an episode. Lights or sounds may be unusually intense. They may feel a little nauseous, and may also have a headache. If a person experiences any of these other symptoms, their ocular migraine may be progressing into a classic migraine, and they should be referred to their medical doctor for treatment.