1. Avoid surgery during menstruation and pregnancy as much as possible. 2.No infectious diseases of the eye. For example, severe keratitis, conjunctivitis, etc. can lead to eye pain, redness, photophobia, tearing and other symptoms, this situation is not suitable for surgery. 3. No systemic diseases. For example, if you have a blood clotting disorder, hypertension, heart disease, diabetes and other systemic underlying diseases, the risk of surgery is much higher than normal people. 4, two weeks before the operation to avoid oral medication with blood-activating effect. Such as aspirin or drugs containing aspirin for cold and flu, Chinese herbal medicine and proprietary Chinese medicine with blood-activating function, these drugs will aggravate the bleeding during the operation. 5.Going to surgery with swollen eyes will also affect the doctor’s judgment, so make sure you get a good sleep a few days before surgery, avoid staying up late, and try to ban smoking and alcohol. 6.Bring healthy skin to the surgery. No infection or allergy to the skin of the eyes; you need to be vegan and avoid makeup on the day of surgery.