There are many reasons for the elderly to have double shadows in their eyes, such as overuse of eyes, astigmatism, cataract, etc. This situation may occur. 1. Excessive eye use: the elderly long time watching cell phone, TV, close-up eyes, resulting in the eyes can not get a good rest, due to long time in the state of eye fatigue, can be caused by the phenomenon of the elderly eyes with double vision. 2. Astigmatism: astigmatism belongs to a refractive error, which can cause the phenomenon of double shadows in the eyes, especially inverse corneal astigmatism, double shadows are especially obvious, and can be accompanied by the phenomenon of dry eyes. 3. Cataracts: double vision in the eyes of the elderly may also be caused by cataracts, cataracts can lead to different degrees of clouding of various parts of the lens, resulting in the phenomenon of double vision. There are many reasons for double vision in the eyes of the elderly, if it can’t be relieved for a long time or accompanied by other uncomfortable symptoms, it is recommended to go to the hospital in time to improve the examination, and follow the doctor’s instructions to take standardized treatment.