Elderly people may have double vision in their eyes due to eye fatigue, astigmatism, cataract and so on. 1. Eye fatigue: the elderly if long time watching TV, cell phone, close eye, do not get a good rest, resulting in long time in the state of eye fatigue, eye lack of moisturizing, which will lead to see things appear heavy shadow, dry eyes discomfort symptoms. 2. Astigmatism: Astigmatism is a disease of the eyes, which can also lead to double vision or blurred vision. Especially for the reverse astigmatism, the double vision is especially obvious, and it is also accompanied by the symptoms of acidity, dryness and so on. 3. Cataracts: When the elderly have cataracts, the degree of clouding of each part of the lens will be inconsistent, leading to the discomfort of double vision in the elderly. When the elderly have the symptom of double vision, it is recommended to go to the ophthalmology department of the hospital in time, to clarify the specific situation, and then timely treatment.