NCIt definition : Tissue located behind the iris and composed of muscle and epithelium. Its functions
include the production of aqueous humor and changing the shape of the crystalline
lens.;
Alternative definition : NCI-GLOSS: A part of the middle layer of the wall of the eye. The ciliary body includes
the ring-shaped muscle that changes the size of the pupil and the shape of the lens
when the eye focuses. It also makes the fluid that fills the eye.; CDISC: Circumferential tissue located behind the iris and composed of muscle and epithelium.; UBERON: The thickened portion of the vascular tunic, which lies between the choroid
and the iris, composed of ciliary muscle and ciliary processes.;