For me the Double Vision, Diplopia, was two equal images slightly out of Horizontal Alignment. If I closed one Eye it went away, since you can't have Double with only one Eye. It lasted a few weeks and has reduced to a permanent condition only when I am very tired and looking to the lower peripheral. I have Nystagmus when I look to either right or left extreme. It is a jiggling of the image. For this reason I don't look to the Extremes.

If the 'Double Vision' persists when you close or block one eye it is not Double Vision, an Alignment Problem, it is most likely Blurred Vision, a Focusing Problem.