[Transplantation of a corneal allogeneic intrastromal ring segment (CAIRS) for treatment of keratectasia].

Corneal allogeneic intrastromal ring segments (CAIRS) were recently introduced as a novel treatment modality for corneal diseases, such as keratoconus or postoperative ectasia after laser-refractive surgery. Contrary to other conventional surgical treatments for ectatic conditions, CAIRS is minimally invasive, freely adjustable in its size and length and has a short learning curve as well as a good safety profile. This article provides step-by-step instructions for the performance and integration of the CAIRS procedure into clinical practice.