Diplopia refers to double vision. We know that vision system is complicated, a minor problem or disorder could impact what we see. Possible causes of double vision including cornea problems, lens problems, nerve problems, muscles problem and brain disorder. Based on your introduction, you got the double vision after your refractive surgery. According to my knowledge, refractive surgery might cause some side effects as blurry vision or double vision. Normally it will subside after the wound on cornea healed. If the symptom persists or worsens, then you need take immediate action to treat it. Visit your doctor or surgeon to see if anything wrong with your surgery. Find out the underlying root, then you can get treatment. In some cases, it can be reversed by medication, for example myasthenia gravis, while in other cases, surgery is a need, such as muscle problems. With detailed examination, the doctor could diagnose what is wrong with your eyes.