1.People with organic diseases such as hypertension, heart disease or diabetes should visit the doctor after the disease is effectively controlled and inform the doctor of their condition at the first consultation so that the doctor can determine the surgical plan. 2.The eyes should be examined in detail to exclude glaucoma, conjunctivitis, keratitis and other diseases before consultation. 3. Make sure you are in good health and free of infectious diseases or other uncomfortable complaints before surgery. 4.Do not take ginseng, deer antler and other tonic products and drugs containing aspirin within two weeks before surgery. 5.Do not wear makeup before surgery. 6.Women should avoid menstrual period.