[Possibilities and limitations in orbital surgery from an ophthalmological point of view]

Since it is possible to approach orbit either from outside or through the cranial cavity, orbital surgery constitutes a borderline field between ophthalmic surgery, facial and neurosurgery. With reference to characteristic cases of space-occupying orbital tumors, an attempt is made to point out limitations and surgical possibilities from the ophthalmological point of view. In this connection, Krönlein's operation, which has almost been forgotten, is described and illustrated with original pictures.