[Electronically controlled motor-trephine for keratoplasty under the microscope (author's transl)].

An electric driven Motor-Trephine for Kerato-plasty is presented. By electronic control the rotation speed of the trephine can be adjusted between 0 and 1000 RPM and shown by a digital indicator. The trephine improves the microscopical view of the operationsfield during the trephination. The trephine is produced by Hans Geuder Ltd.