Ciliary Body

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ciliary body

[¦sil·ē‚er·ē ¦bäd·ē]
(anatomy)
A ring of tissue lying just anterior to the retinal margin of the eye.

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

References in periodicals archive ?
Our study concludes that cataract surgery improvedvisual outcome in eyes that have undergone pars plana vitrectomy previously.
Fixation of 3- piece IOL to iris with a Siepser knot of 10/0 nylon suture after pars plana vitrectomy and IOL exchange is an option for the management of such cases.
Rationale of the study was to measure the change in corneal dioptric power; which is a crucial indicator of any change in refractive power of the eye, as a result of the 23-gauge pars plana vitrectomy.
Dusova et al., "Microincision 25G pars plana vitrectomy with peeling of the inner limiting membrane and air tamponade in idiopathic macular hole," European Journal of Ophthalmology, vol.
This retrospective study included 40 patients (40 eyes) who underwent pars plana vitrectomy or combined phacovitrectomy with ILM peeling for the idiopathic epiretinal membrane between 2015 and 2016 at St.
Arai et al., "The effect of posterior sub-Tenon's capsule triamcinolone acetonide injection to that of pars plana vitrectomy for diabetic macular edema," Clinical Ophthalmology, vol.
Charles, "Comparison of observation, intravitreal bevacizumab, or pars plana vitrectomy for non-proliferative type 2 idiopathic macular telangiectasia," Graefes Archive for Clinical and Experimental Ophthalmology, vol.
These patients should receive laser treatment, for example panretinal photocoagulation, or a pars plana vitrectomy much sooner.
Postprocedural endophthalmitis is uncommon, complicating 0.04% of either intravitreal injections or pars plana vitrectomies (1,2).
In 54 chapters, they provide photos and instructions on minimally penetrative surgery with microtubes, glaucoma shunts, pars plana AGV, canaloplasty, carbon dioxide laser assisted deep sclerectomy and titanium-sapphire laser trabeculoplasty, drainage implant and refractive surgery, and other procedures.
Kiss explains that treatment of macular schisis requires surgery, a procedure called pars plana vitrectomy.

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