The aim of this study was to examine the expression of tenascin-C, matrilin-2, and aggrecan in irreversible corneal endothelial pathology such as pseudophakic bullous keratopathy (PBK) and Fuchs’ endothelial corneal dystrophy (FECD), which most frequently require corneal transplantation. The gene discussed is TNC; the disease is Fuchs' endothelial dystrophy.