Ocular migraine

Retinal migraine

Sometimes, the term "ocular migraine" is used as a synonym for the medical term "retinal migraine." A retinal migraine is a rare condition occurring in a person who has experienced other symptoms of migraine. Retinal migraine involves repeated bouts of short-lasting, diminished vision or blindness. This may precede or accompany a headache.

A retinal migraine — unlike a migraine aura affecting vision — will affect only one eye, not both. Most often, loss of vision in one eye isn't related to migraine. It's generally caused by some other more serious condition. So if you experience visual loss in one eye, be sure to see an eye specialist.

What causes it?

Some experts believe the problem is related to spasms in blood vessels of the retina, the lining at the back of the eye. Others think that changes in the nerve cells of the retina are related to the problem.

Treatment 

Ocular migraines usually go away on their own within 30 minutes, so most people don’t need treatment for them.

References

http://www.webmd.com/migraines-headaches/guide/ocular-migraine-basics

http://www.healthline.com/health/causes-of-ocular-migraines#Causes1

http://www.allaboutvision.com/conditions/ocular-migraine.htm

http://www.mayoclinic.org/diseases-conditions/migraine-headache/expert-answers/ocular-migraine/faq-20058113