Ray body or ciliary body (lat. corpus ciliare ) is ring-shaped and is located on the inside of the sclera a little behind the iris.
It is made up of many blood vessels, muscle and nerve threads. In its front part, it continues to the iris, and a little further back, thin threads, zonules, emerge from it. The other end of the zonule grips the equator of the lens and thus holds it in a certain position. The corpus radium produces the aqueous humor, the fluid that fills the anterior and posterior chambers of the eye. By tensing (contraction) and relaxing the muscle threads, the zonules are also tensed and relaxed, and in this way the shape and position of the lens changes and accommodation is made possible.
Literature:
M.Sc. sc. Pavan Dr. Joško, “Eye Diseases”, Zagreb 2003.
