The main precautions before myopia correction surgery are to stop wearing contact lenses temporarily, strictly maintain eye hygiene, and order antibiotic eye drops early. 1. Discontinue wearing contact lenses: Before the surgery, if the patient has ever worn contact lenses, he/she needs to stop using contact lenses for at least half a month, and if he/she uses keratoplasty, he/she needs to stop wearing keratoplasty for at least 3 months, or else the accuracy of the pre-surgery examination will be affected. 2. Maintain eye hygiene: patients must strictly maintain eye hygiene before the surgical treatment to avoid contaminating the eyes and triggering infections, otherwise the surgery cannot be performed. 3. Early antibiotic eye drops: Patients usually need to order antibiotic eye drops, such as ofloxacin eye drops, tobramycin eye drops, etc., 3 days before the surgical treatment, which is conducive to reducing the occurrence of postoperative infection. Before myopia surgery, follow the doctor’s instructions to do a good preoperative examination, meet the indications for surgery and then do myopia surgery.