Figure 2. Corneal graft (border zone) on the day of surgery. A: Group S: Transplantation of endothelium-free transplant after endothelial debridement. The host endothelium is intact, while the graft is devoid of endothelium (see magnification). B: Control group: Transplantation of an untreated graft with endothelium visible on the host cornea and the graft (magnification) directly following surgery. Straight arrow: Suture indicating graft border. Alicarin red S flatmount staining; Magnification: Overview 100×, details 400×.