My dad has had this before but it went away. Now it has come back. He is experiencing double vision when he looks with both eyes. If he covers one eye, he is fine (but does not have any depth perception).
He is around 50 and does not want to go thru another series of tests. The last time this happened he went to a lot of different doctors and none were able to find a cause or a solution.
One doctor suggested that it could be related to a virus, but that was never confirmed. Has anyone heard of that sort of thing?
The other worry is that it could be related to an aneurysm. Is there anything else that could cause this?
I should add that he has recently been complaining about feeling out of breath during the day.