Do not wear hard or soft contact lenses for 2 weeks before the surgery; please follow the doctor’s instruction to use antibacterial eye drops every day for 3 days before the surgery Pay attention to adequate rest and avoid eye fatigue, which may cause eye regulation spasm. Wash your face on the day of surgery and do not wear makeup on your eyes to avoid difficulties in disinfecting the eye cleaning phase before surgery; do not use perfumes, scented shampoos and any cosmetics with irritating odors to avoid affecting the working condition of the laser machine and affecting the results of the surgery.