Posterior Iris Epithelium
Posterior pigmented iris epithelium. The large melanin granules of the iris pigmented epithelium are round in cross-section, measuring 0.6 um and of spindle shape in longitudinal section, measuring 1.96 um in length. Note that these granules are membrane-bound (a) and that there is a narrow zone at the periphery of the granule (arrows) free of melanin. An incompletely melanized granule (b) is seen on the right (X 62,5000).
