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Ocular migraine headaches are usually caused by a temporary spasm of the blood vessels in the back of the brain. The condition can create episodic neurovisual disturbances called a visual aura.
Symptoms of Visual Aura
- Blank spots in your vision
- Flickering colored lights
- Zig-zag lines in your vision
- Blurred area of vision – "like looking through a heat wave"
- Usually benign and require no treatment
- Medical consultation if post-aura symptoms do not resolve properly