Orthokeratology mirror belongs to the third kind of medical equipment and needs to be fitted in regular hospitals. It takes about 2 hours to fit, and I will try it on you on the day of inspection. After passing the examination, the doctor will tailor the lens for you according to your examination results. After wearing it, patients need to go back to the hospital regularly for relevant review, which can generally be used for about 2 years under normal care.