Ciliary Body

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ciliary body

[¦sil·ē‚er·ē ¦bäd·ē]
A ring of tissue lying just anterior to the retinal margin of the eye.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Ciliary Body


in terrestrial vertebrates, including humans, the part of the eye that converts blood serum into the intraocular fluid that is secreted into the posterior chamber of the eye. The ciliary body forms a circle of numerous radial folds (70 to 80 in humans) on the internal surface of the eye between the iris and the retina. It consists of mesodermal stroma and two neuroepithelia. The external pigmented neuroepithelium is a continuation of the pigmented epithelium of the retina, whereas the nonpigmented internal layer, which plays a major role in the secretion of intraocular fluid, is a continuation of the retina proper.

Fibers of the zonule of Zinn are attached to the basal membrane of the ciliary folds. The amount of tension of the ligament is determined by contraction of the circular ciliary muscle situated in the stroma of the ciliary body near the place of contact with the sclera. The tension of the ciliary muscle determines the shape of the crystalline lens. The ciliary body is the most vascularized part of the eye; it is supplied by blood vessels from the systemic circulation of the iris.

Inflammation of the ciliary body is called cyclitis; inflammation of both the ciliary body and the iris is called iridocyclitis.


Stroeva, O. G. Morfogenez i vrozhdennye anomalii glaza mlekopitaiushchikh. Moscow, 1971.
Davson, H. The Physiology of the Eye, 3rd ed. Edinburgh-London, 1972.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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(10) as a reference study, where the authors evaluated the effects of systemic dexamethasone on wound healing in septal mucosal damage created in a rat model, the epithelial and subepithelial thicknesses were measured and goblet, ciliary, and inflammatory cells were counted in our study.
The bilaterally symmetrical nervous system of the ophiopluteus first forms at the anterior end (apical organ) of the late gastrula stage embryo; and later it is associated with the ciliary band, oral epidermis, and digestive system of the larva (Cisternas and Byrne, 2003; Byrne et al., 2008; Hirokawa et al., 2008; Dupont et al., 2009; Gliznutsa and Dautov, 2011).
The presence of luminal constrictions before irregularly dilated capillaries in the anterior ciliary processes suggests precapillary sphincters.
Transillumination was used to identify the ciliary body position if uncertain, as in congenital glaucoma or in those with a previous history of intraocular surgery.
Primary ciliary dyskinesia is phenotypically and genetically a heterogeneous condition, wherein the primary defect is in the ultrastructures or function of cilia.
Primary ciliary dyskinesia is a rare, genetically heterogeneous disorder that results in impairment of mucosal ciliary movement.
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With ciliochoroidal effusion and anterior rotation of the ciliary body, the iris-lens diaphragm moves forward, the zonules relax, and the lens thickens, which results in myopic shift and narrowing or closure of the anterior chamber angle [1,4].
Surgical preservation of residual capsulorhexis and reconstruction of the ciliary sulcus are necessary for the stability of a sulcus IOL.
The eyes were enucleated, and the iris and ciliary body were carefully isolated under an operating microscope.
Few cases of common or idiopathic nonarteritic anterior ION have been examined histologically; those that have displayed little more than age-related vascular change of the posterior ciliary arteries.