Figure 3. Healthy graft in a recipient cornea with bullous keratopathy (Group ‘bullous host’). The healthy graft endothelium remains on the graft. The peripheral benzalkonium chloride (BAK)-damaged endothelium is not replaced by the green fluorescent protein (GFP)-positive graft endothelium. A: High magnification of the endothelial cell layer of the host and the graft (original magnification: 1200×). B: Overview showing the graft border zone. The white arrow indicates one of the sutures in the host-graft junction (original magnification: 100×).