Fig. 8. The ciliary process unit. All unstained. A. Three ciliary units on the nasal side of the ciliary body. Pigmented ciliary ridges demarcate the edges of the unit, with a ciliary process lying centrally. Minor processes and plicae tend to occur at the ends of the ridges. (X 15) B. Nasal ora serrata (or) showing junction of retinal and ciliary pigment epithelium after removal of retina and vitreous. Pigment clumps near the ora have a whorled, disorderly pattern. (X 60) C. Pigment clumps above temporal ora serrata (or) show a regular anteroposterior pattern. (X 60)