As we all know, all surgeries require some necessary preparation before the surgery, and Lasik surgery is no exception. Sign the informed consent form for the surgery. 2. Ask a relative to accompany you on the day of surgery and return to your home after surgery. 3.You should stop wearing contact lenses (soft contact lenses for 1-2 weeks, hard contact lenses for 2-3 weeks, and OK lenses for 3-6 months), subject to the recovery of corneal topography. 4, 3 days before surgery should generally be local antibiotic eye drops, diet should be light. 5.Pre-operative gaze training should be done so that you can cooperate well with the surgeon during surgery. 6.The day before surgery, please take a shower and wash your hair, and have enough sleep at night. 7.Wash your face and eyes on the day of surgery. Do not put on makeup because it will affect the sterilization effect; do not use perfume and any cosmetics with irritating smell because they will interfere with the working state of the laser machine and affect the effect of the surgery. 8, the day of surgery can be normal light diet; dress in loose, comfortable, as far as possible not to wear overhead clothing, the operating room temperature is constant, generally at 20-22 degrees, please pay attention to the warmth of clothing. 9.After local disinfection of the eye before surgery, do not wipe or touch the eye with your hand again, if you touch it, please tell the nurse in time. 10.When waiting before surgery, please relax and wait for the staff arrangement.