There are two possibilities for the eyes to always see things as 2: First, there may be astigmatism in the eyes, often with one eye seeing things as double shadows, which is a manifestation of astigmatism. This astigmatism needs to go to the hospital for optometry and prescription lenses, which can correct the phenomenon of double vision. Second, it is diplopia, that is, double vision, may be eye muscle problems or eye nerve problems, this problem requires a detailed examination to exclude muscle and nerve conduction problems. If it is a muscle problem, such as strabismus, we can use prismatic lenses or surgery to correct the problem. In addition, there may be problems with the eye’s focusing or diverging functions. These problems can be detected by examination, and can be corrected by training for focusing and separation. If the patient cannot be corrected, only surgery can be taken to correct the problem.