Fig. 16b B. Anterior view of the ciliary processes shows the zonules attaching to the lens. Zonules form columns (a) on either side of the ciliary processes (b), which meet on a single site (c) as they attach to the lens. These two columns form a triangle having its base on the ciliary body and its apex on the lens. The zonules form a tentlike structure (d) as they become attached to the lens capsule. The equatorial surface of the lens is crenated (e) by the attachment of the zonule. The iris is pulled upward, showing its posterior surface with the radial (f) folds and the circular furrows (g). (Hogan M, Alvarado J, Weddell J: Histology of the Human Eye—An Atlas and Textbook, pp 272, 273. Philadelphia, WB Saunders, 1971)