ciliary muscle


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cil·i·ar·y mus·cle

[TA]
the intrinsic smooth muscle of the ciliary body of eyeball; it consists of circular fibers [TA] (fibrae circulares [TA]), radial fibers [TA] (fibrae radialis [TA]), meridional fibers [TA] (fibrae meridionales [TA]), and longitudinal fibers [TA] (fibrae longitudinales [TA]); action, in contracting, its diameter is reduced (like a sphincter's), reducing tensile (stretching) forces on lens, allowing the lens to thicken for near vision (accommodation).
Farlex Partner Medical Dictionary © Farlex 2012

cil·i·ar·y mus·cle

(sil'ē-ar-ē mŭs'ĕl) [TA]
The smooth muscle of the ciliary body; it consists of circular fibers (Müller muscle) and radiating fibers (meridional fibers, or Brücke muscle); action, in contracting, its diameter is reduced (like a sphincter), reducing tensile (stretching) forces on lens, allowing it to thicken for near vision (accommodation).
Synonym(s): musculus ciliaris [TA] .
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

ciliary muscle

any muscle contained within the CILIARY BODY surrounding the lens of the vertebrate eye. Through attachment to the lens they change its shape and bring about ACCOMMODATION (1).
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

Bowman,

Sir William, English ophthalmologist, anatomist, and physiologist, 1816-1892.
Bowman capsule - the expanded beginning of a nephron. Synonym(s): glomerular capsule
Bowman disk - disk resulting from transverse segmentation of striated muscular fiber treated with weak acids, certain alkaline solutions, or freezing.
Bowman eye knife
Bowman gland
Bowman iris needle
Bowman iris scissors
Bowman lacrimal dilator
Bowman lacrimal probe
Bowman membrane - Synonym(s): anterior limiting layer of cornea
Bowman muscle - Synonym(s): ciliary muscle
Bowman probe - a double-ended probe for the lacrimal duct.
Bowman space - the slitlike space between the visceral and parietal layers of the capsule of the renal corpuscle. Synonym(s): capsular space
Bowman strabismus scissors
Bowman theory - that urine is formed by passive filtration through the glomeruli and secretion by the epithelium of the tubules.
Medical Eponyms © Farlex 2012

cil·i·ar·y mus·cle

(sil'ē-ar-ē mŭs'ĕl) [TA]
The smooth muscle of the ciliary body; action, in contracting, its diameter is reduced (like a sphincter), reducing tensile (stretching) forces on ocular lens, allowing it to thicken for near vision (accommodation).
Synonym(s): musculus ciliaris [TA] .
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
Compared with control subjects, those given 6 mg astaxanthin daily had improved blood flow to the small blood vessels in the retina, which is a specialized layer that transmits visual information reaching the back of the eye, and potentially to the ciliary muscle.
(58) Thus the question 'what causes myopia?' appeared to be answered as 'prolonged accommodation induces myopia and atropine prevents this contraction of the ciliary muscle'.
Pilocarpine acts at parasympathetic muscarinic receptor site to cause ciliary muscle spasm and pupillary miosis.
Davies, "The effect of ageing on in vivo human ciliary muscle morphology and contractility," Investigative Ophthalmology and Visual Science, vol.
Magnetic resonance imaging of the anteroposterior position and thickness of the aging, accommodating, phakic, and pseudophakic ciliary muscle. J Cataract Refract Surg.
The focusing muscle, however, requires the availability of chromium and supporting nutrition to potentiate the uptake of adequate glucose fuel to power the ciliary muscles inside the eye.
Alongside, supportive therapy like pain medications are given, including topical cycloplegics like atropine or homatropine to dilate the pupil and thereby stop spasms of the ciliary muscle. Superficial ulcers may heal in less than a week.
A cyclodialysis cleft is the result of the separation of the longitudinal ciliary muscle fibers from scleral spur and causes an abnormal drainage pathway for the aqueous humor [1, 2].
The ciliary muscle has been shown to be relatively unaffected by the ageing process, (14) with decreased flexibility of the lens considered to be the main cause of presbyopia.
(21) Accommodating IOLs operate with contraction of the ciliary muscle, which remains functional until late in life.
Topical cydoplegics/mydriatic eye drops are used to control pain caused by ciliary muscle spasm which frequently occurs with acute anterior uveitis and to break or prevent synechiae.