Figure 4. Histopathological findings of the corneal button taken from the right eye. A: Hematoxylin and eosin staining shows amorphous deposits in the subepithelial region (asterisk). The overlying epithelium is degenerated, and Bowman’s layer is completely replaced by deposits. Underneath these amorphous deposits, there are globular deposits of various sizes with irregular peripheral margins that stained weakly with eosin (arrow). B: Amyloidal deposition is confirmed in the subepithelium with Congo red staining (asterisk). While the globular deposits of various sizes located primarily in the anterior stroma stained negatively with Congo red (arrow) (original magnification 100×).