There are various factors could cause double vision, which could present in both eyes and just one eye. In the case of double vision in one eye, there are a few eye disorders can cause it. Firstly, cataracts are a common eye problem for aging people. In the early stages when the cataract is small, it may distort vision to the point that double vision occurs in the affected eye. And the muscles that control eye movement become weak or damaged, thus the eye will not be able to move to interpret images properly. This could lead to double vision in one eye only. Additionally, astigmatism and dry eye are two conditions that can make double vision in one eye.