Figure 4. Transmission electron microscopy images of the corneal allograft from subject II:1. A: Low magnification photomicrograph showing basal epithelial cells (Ep) overlying a band of deposit (De), at higher magnification in B. The insert in B is shown in higher magnification in C, demonstrating the degenerating basal epithelial cell (Dc) above the dotted line, and below the subepithelial deposit, consisting of irregular aggregates of fibrils (Cf) as demonstrated with arrows. The large arrowhead shows a degenerating adhesion body.