Four times in the last 6 months, including today, I experienced double vision (my eyes went 'out of focus' with each other?) suddenly. However, during this event, when either eye was covered, vision was fine in the other eye. Condition lasted maybe 1 minute, no other symptoms. Was reading first two times, walking into a store the second time, and working at the sink the fourth time (today). I did have a migraine headache yesterday with a follow-up visual light-show this morning. However I can't definitely tie it to migraines the first three times it happened, although that is a possibility, as I have a migraine about once or twice a month. I'm a 69 year male. I take one Claritin each morning and no prescription meds. I have a visual exam annually. I wear reading classes when reading or doing other up close detailed work.