Ocular Migraine
WebMD: Better information. Better health.
If you have ocular migraine, you may get vision loss or blindness in one eye for a short time -- less than an hour. You can have it along with or after a migraine headache.
It's a rare problem. Some research suggests that in many cases, the symptoms are due to other problems.
Regular migraine attacks can also cause vision problems, called an aura, which can involve flashing lights and blind spots. But these symptoms usually appear in both eyes.
See your doctor to find out if you have ocular migraine. He can rule out other conditions that can cause similar symptoms. Be ready to describe what you went through as completely as you can to help him figure out what's really going on.
https://www.webmd.com/migraines-headaches/common-headaches-17/migraine/ocular-migraine-basics#1
