The invention concerns a method for treating keratoconus, wherein a laser beam is directed to the cornea (1) of the eye of a patient suffering from keratoconus and wherein a circular laser-cut (14) is made within the stroma layer (7) of cornea (1) around the optical axis (13) of the eye creating an annular scar within the stroma layer (7) to stabilize the diseased cornea (1). The method is an improvement of the so-called circular keratotomy (CKT) performed with mechanical incision. It does not open the surface of the eye so that no infection may occur. No suture is needed that has to be watched, possibly renewed and removed under the mircoscope. It allows a fast treatment and safe postoperative recovery and typically needs no anesthesia.
