Patients preparing for laser eye bags need to know the following things before surgery: 1. There is no inflammation in the tissues of the eye area, such as conjunctivitis, granuloma, trachoma, and so on. 2, The lower eyelid area has not been traumatized or operated. 3, the position of the lower eyelid is not displaced. 4.No cold, cough symptoms and normal blood count in the recent days of surgery. 5.No skin allergies such as erythema, papules within 7 days of surgery. 6.Require normal blood sugar, normal ECG, blood pressure is not higher than 140/90mmHg. 7.On the day of the surgery, bring a good case at the initial consultation, ice packs, anti-swelling drugs or anti-inflammatory drugs in the hospital with.