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True double vision as in seeing two images is a complicated from a medical perspective. Not many things produce actual double vision, disconjugate gaze is one. Most times when people describe double vision they are actually describing blurry vision that can seem like two images one usually smudged or distorted.
I suspect in your case it was not true double vision but possibly sugar related.
Did it clear once you rested and replenished your blood glucose?
Diabetics are more prone to ocular motor nerve palsies and that will produce disconjugate gaze and double vision but doesn't clear with correction of sugar.
If it's better I wouldn't worry about it unless it's recurrent if it didn't clear you need medical attention sooner rather than later.
Good luck
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