The aim of refractive surgery is a good postoperative visual acuity and the satisfaction of the patient. To reach this, a good selection of the patient is important. Each patient has to be evaluated personally and individually at the hand of the next criteria: A complete preoperative examination The motivation and the expectations of each patient The possibilities and the complications of each operative technique. the contra-indications of the refractive surgery and each operative technique. In case of small and moderate myopia, the results of the radial keratotomy and the excimer-laser are similar and comparable with each other. In case of moderate and high myopia, the excimer-laser (PRK and LASIK) is the only valuable operative technique.