Preventing infection, general examination and eye examination are usually required to prepare for myopic surgery. 1. Preventing infection: Patients need to use antibiotic eye drops for 2-3 days before surgery to keep the conjunctival sac in a relatively sterile state, thus preventing postoperative infection. 2. Systemic examination: patients should also undergo a systemic systemic examination, usually ECG, chest X-ray, coagulation mechanism, blood routine, virus-related and other tests. 3. Ophthalmologic examination: It mainly includes corneal related indexes, such as corneal topography, corneal endothelial count, corneal curvature, corneal thickness, IOL measurement, and A-B ultrasound examination of the eyes. Patients can be considered for surgical treatment if there are no contraindications to surgery after perfecting these examinations. If you need to undergo myopic surgery, please go to a regular hospital in time, do the relevant examinations under the guidance of the doctor, and choose the appropriate surgical plan to avoid any adverse effects.