Some people who suffer from migraines experience what it is known as a migraine aura before their migraine attack builds up capacity. It typically involves visual disturbances, such as blind spots, blurred or double vision, loss of vision, flashing or shimmering lights, or even geometric patterns. An aura can also bring on feelings of vertigo, dizziness, fainting, ringing ears, or loss of balance. To learn more about migraine auras, click here.