Fig. 2. Scanning electron micrograph of the inner surface of the iris and ciliary body with the lens and zonules removed. The pars plicata region is distinguished from the more posterior pars plana region (asterisk) by the presence of major (M) and minor (m) ciliary processes. (From Morrison JC, Van Buskirk EM, Freddo T. Anatomy, microcirculation and ultrastructure of the ciliary body. In: Ritch R, Shields MB, Krupin T (eds). The Glaucomas. St Louis: CV Mosby, 1989.)