[Astigmatis following perforating keratoplasty in keratoconus patients (author's transl)].

Earlier studies of successful keratoplasties in keratoconus patients showed that despite clear healing of transplants, a high degree of regular astigmatism very often results. A series of 28 eyes operated with a double running corneal suture is critically analyzed. It can be seen that, even using this suture technique, the final result after removal of the two sutures is still accompanied by a high degree of astigmatism. The cause of the residual astigmatism is thus probably due to the weakness of the peripheral corneal rim.