No drugs at all, actually, except occasionally Midol and an iron supplement.

I hit some promising results when I searched "double vision". Most of them are caused by things like aneurysm, stroke, hemorrhages, diabetes, tumors, etc. >>' I think I'd be having more symptoms if any of those were the cause.

But a few seem to describe something close to what's going on with me.

I don't know what could be the cause. It was happening to me earlier today, which is why I was posting about it (doing it while I remembered because I usually forget once the episode is over). But it has stopped. I have not done anything in between that I believe would influence it. No caffeine today, no more sleep deprived now than I was a few hours ago when it was happening. The only difference really is that I'm not staring at something some hundred yards away from me, and I don't think that's significant since it's happened at close (i.e. staring at a cell phone) and long range (staring at some distant item) and in between.

(Half the reason for the post/thread is to collect my thoughts. I will use this information for a more comprehensive, detailed report later for if/when I discuss this with my doctor.)