Fig. 16. Zonular fibers and fibrogranular surface of ciliary nonpigmented epithelial basement membrane. A. Small fibrillar zonules on the sides of the ciliary processes. Whether they are continuous or terminating cannot always be determined (SEM, × 250). B. Higher-power view from boxed area in A, showing zonules merging into fibrogranular basement and adhesive surface matrix (SEM, × 5,000).