mandi_c69 asked
Ocular Migraine is a variant of migraine that is not uncommon. It is believed to be caused by the same mechanism as classical migraine; vascular spasm. Instead of the spasm affecting the surface of the brain, these episodes affect the ocular blood supply or the blood supply to the vision center in the brain. Typically, these episodes begin with a visual disturbance that begins in the peripheral vision. It often consists of a semi-circular, jagged, shimmering light, which enlarges and becomes more central. This disturbance usually obscures the vision within the jagged area. The light is often described a pale pastel in color. In the typical episode, the visual disturbance lasts 15 – 20 minutes and then disappears. A mild headache may or may not follow the disturbance. Many ocular migraine sufferers complain only of fatigue after the visual disturbance.
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