Hi. I'm online and happy to answer your question today.
There are a number of conditions that can cause a brief episode of double vision (diplopia). It could be anything from dry eyes and blepharitis causing problems with your tear film to vascular problems causing nerve problems to the muscles that move your eye.
I do not think this is an emergency but I suggest that you have a complete examination by an ophthalmologist to better understand what caused this brief episode of double vision. If there are no ophthalmologists nearby starting with a visit to your internal medicine physician would be OK.
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