Fig. 11 Meridional complexes show the basic constituents: an atypical dentate process that aligns with and extends to an enlarged ciliary process. These complexes also have meridional retinal folds that extend along the dentate process and posteriorly into the peripheral retina. Peripheral retinal excavation (open arrow) is aligned with the complex on left. (Straatsma BR, Foos RY, Feman SS: Degenerative diseases of the peripheral retina. In Duane TD (ed): Clinical Ophthalmology, Vol 3. Hagerstown, MD; Harper Row, 1979:1–29)