Figure 2: Light microscopic overview for illustrational purposes of the ciliary body epithelium (CE) consisting of pars plicata (Pli) and pars plana (Pla), as well as surrounding tissue including the lens and the iris pigmented epithelium (IPE) of the adult human eye. Almost complete absence of immunohistochemical Nestin-staining of IPE and Pli of the normal adult human eye (left inset), while there is intense Nestin-staining in the nonlaminated far peripheral retina (PR) and around peripheral cysts extending into the most posterior pars plana of the CE (right inset).