An ocular migraine with aura can cause temporary visual disturbances, such as flashing lights, zigzag lines, blind spots, or shimmering patterns. These symptoms usually develop gradually and last between 5 and 60 minutes. Some people experience a headache afterward, while others have visual symptoms without pain. Common triggers include stress, dehydration, bright lights, lack of sleep, smell sensitivities, or certain foods. Although ocular migraines are often harmless, sudden vision loss, symptoms lasting longer than an hour, or new neurological symptoms should be evaluated promptly. A healthcare provider can help confirm the diagnosis and discuss appropriate treatment and prevention strategies.