After cataract surgery, if the other eye, that is, the non-operated eye, has severe double vision, it is necessary to have a timely examination to clarify the cause of the disease, for example, cataract, high astigmatism, etc., and according to the cause of the disease, surgery or glasses will be given to correct the problem. Cataract: When the patient’s other eye suffers from cataract, the lens is cloudy, which can affect the quality of light refracted from the external environment into the inner part of the eye, thus causing double vision, if it is caused by cataract after examination, it can be treated by surgery. High astigmatism: Patients with astigmatism in the other eye may also experience double vision, which can be diagnosed through an optometry test and subsequently corrected by wearing glasses. There are various reasons for the seriousness of double vision in the other eye after cataract surgery, you need to go to the ophthalmology department of the hospital for examination first, to clarify the cause of the disease, and carry out targeted treatment under the guidance of the doctor.