Can you get double vision but in one eye?

Yes: The common form of doubling is when the eyes are misaligned with each other. If the doubling occurs in one eye only the following must be looked for and dealt with: 1) higher degrees of astigmatism 2) corneal aberrations 3) lens opacities that are not uniform 4) retinal (macular) wrinkling. See your ophthalmologist who can sort this out and recommend the best correction.

Yes: Double vision in one eye can be caused by abnormalities of the cornea (clear dome over the front of the eye), the lens (behind the iris): both of these help focus light. It can also be from an irregularity in the retina, the tissue that lines the back of your eye and senses light. The central retina, the macula can develop scar tissue on top, (macular pucker) or bleeding or swelling underneath.