Fig. 25. Ciliary pigmented epithelial cells in mid pars plana of a young adult. The cytoplasm is electron-dense with many tonofilaments (T) (intermediate filaments). Lipid droplets (L) are present around dark lysosomal residual bodies. Desmosomes connect the cells (arrow). The basal surface and intercellular junctional areas are markedly infolded, and the basement membrane is moderately thick. Negative images of collagen fibers (COL) are seen below, in the dense stroma typical of this region (X 17,500)