What is the definition or description of: ocular migraine?

Retinal Migraine. The thought is that the same mechanism involved in the aura phase of migraine is reponsible fro retinal migraine. Think of it this way; the person has the aura but not the headache.
Vision disturbance. Ocular migraines cause vision loss or blindness lasting less than an hour, along with or following a migraine headache. It is a rare finding in migraines but should be evaluated by a neurologist and an opthalmogist to rule out other possible underlying conditions.
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.