Fig. 13. Ciliary nonpigmented epithelium. A. Anterior pars plicata, age 3. (hematoxylin-eosin, X 800) B. Posterior pars plicata with areas of thickened, pigmented epithelium, age 3. m, ciliary muscle (hematoxylin-eosin, X 800) C. Nodular proliferation of the nonpigmented epithelium appears as small cellular caps over the surface at age 70. Z, zonule. (hematoxylin-eosin, X 400) D. Distorted epithelium of pars plana shows evidence of traction in both anterior and posterior directions (adult). (hematoxylin-eosin, X 400)