Readers beware! The article referenced below is highly inaccurate. In the International Headache Society's International Classification of Headache Disorders, the gold standard for diagnosing and classifying Migraine and other headache disorders, there is no diagnosis of "ocular Migraine. Additionally, what's written about retinal Migraine in the article below is horribly inaccurate. If you need information about retinal Migraine, please see this physician reviewed article, Retinal Migraine - The Basics.
"Ocular migraine (retinal migraine) is a temporary disturbance of vision, affecting one or both eyes. Episodes of ocular migraines are painless but can be quite frightening if you don’t know what is going on. Generally, ocular migraines will resolve on their own within 30 minutes without medications..."