Ocular Migraine: Symptoms, Causes and When Zigzag Vision Needs a Doctor eye exam Alpharetta · flashes · migraine aura · neuro-ophthalmology · ocular migraine · Nov 03, 2026 What is an ocular migraine? Learn what a migraine visual aura looks like, how long it lasts, common triggers, the cover-one-eye test, how it differs from a retinal tear or mini-stroke, and when zigzag lines or flashes need a same-day eye exam.