OverviewThe ciliary body is a ring of tissue that encircles the lens. The ciliary body contains smooth muscle fibers called ciliary muscles that help to control the shape of the lens. Towards the posterior surface of the lens there are ciliary processes which contain capillaries. The capillaries secrete the fluid (aqueous humor) into the anterior segment of the eyeball.
Update Date 8/11/2013
Updated by: Linda J. Vorvick, MD, Medical Director and Director of Didactic Curriculum, MEDEX Northwest Division of Physician Assistant Studies, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington. Also reviewed by David Zieve, MD, MHA, Bethanne Black, and the A.D.A.M. Editorial team.