What causes an ocular migraine? i only recently started having them and don't know how seriously to take them. i have a c-shaped distortion in my eye.

Brain irritation: The visual illusions of migraine come from irritation of the occipital lobes of the brain. They do not occur from eye problems. They are usually benign and serve as a warning that the headache is coming. The best treatment would be Aspirin as soon as the visual illusion occurs. This will improve blood flow to the brain and decrease the irritation and perhaps avoid the trobbing pain.

Ocular migraines!: Ocular migraines are a form of migraines that take place in the occipital cortex (part of the brain that interprets/controls vision). They lack the severe headache as common migraines. The symptoms are usually all or mostly visual and are typically described as flashing of light or ziz-zag lights in the vision. They usually last less than 30 minutes and affect the vision out of both eyes.