correlative microscopic analysis of the corneal button obtained from the first transplant showed an irregular epithelium , a continuously thickened bowman 's layer , fragmentation and homogenization of the anterior stromal lamellae , a mildly enlarged stromal fibril diameter , abnormal collagen layers posterior to descemet 's membrane , atrophic paracentral corneal endothelium , and absent central endothelium .
C0010031
corneal
C0229127
bowman 's layer