Figure 1. Allograft of corneal epithelial cell sheet on autologous platelet poor plasma clot. A, B, D: Once the lamellar keratectomy is performed, the rabbit stromal surface is covered with a corneal epithelial cell sheet, which is sutured with eight noncontinuous 10.0 nylon sutures. C: The corneal epithelial cell sheet presents a stratified epithelium consisting of four layers, inferior cells are polygonal and disclose a prominent nucleolus while cells of mid epithelium show irregular morphology, and superficial cells are flattened with a compact ovoid nucleus of homogeneous chromatin.