ciliary process, any one of about 80 tiny fleshy projections on the posterior surface of the iris, forming a frill around the margin of the crystalline lens of the eye. The processes compose one of the two zones of the ciliary body of the eye and are formed by infolding of the various layers of the choroid. They secrete nutrient fluids to nourish the lens, cornea, and vitreous body. See also ciliary body.