Ciliary Body

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Related to Ciliary processes: ciliary muscle

ciliary body

[¦sil·ē‚er·ē ¦bäd·ē]
(anatomy)
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 It might be outdated or ideologically biased.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.

REFERENCES

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

O. G. STROEVA

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Major pathophysiological factors include abnormal anatomic relationships between ciliary processes, the crystalline or intraocular lens, and the anterior vitreous face [3,12,13], abnormal permeability of the anterior hyaloids [3,7], expansion of choroid [14], or anterior rotation of the ciliary body [15].
(1,2,3) This procedure includes argon laser photocoagulation of the ciliary processes after visualization with a goniolens.
Aqueous humour is derived from the blood plasma of the capillaries within the ciliary processes of the ciliary body.
The following procedures proposed to ablate the ciliary body avoided the excision and aimed at ablate-selected portions of the ciliary processes, by using different physical approaches.
The authors stated that TALC may be a safe and effective alternative method for reducing IOP in eyes that have visible ciliary processes and do not respond to conventional treatments.