Figure 7. Transmission electron microscopy (TEM) showing epithelial BM assembly. A: The presence of a well-orchestrated, multi-layered stratified epithelium when cultured in the presence of fibroblasts in the stroma (Mag.: 890×). B: The presence of fibroblasts embedded and dispersed in the collagen matrix (Mag.: 890×). C,D: The presence of a well-assembled epithelial BM when co-cultured with corneal fibroblasts, as indicated by arrows directly beneath the epithelial cells (Mag.: 30,000×).