Fig. 16. Ciliary epithelium in the anterior pars plicata of a 19-year-old. Posterior chamber surface (PC) of the nonpigmented epithelium (NPE) has a sawtooth pattern seen irregularly throughout this layer with aging. Mitochondria (m) are large, plentiful, and show artifactual hydropic change. Rough endoplasmic reticulum is present below the nuclei (asterisk). Note that the apices of the pigmented epithelial cells (PE) are conical, with prolongations of NPE between them. (X 8320)