Ciliary muscle: [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). SYN: musculus ciliaris [TA], Bowman muscle, ciliary ligament.
Source: Stedman's Medical Spellchecker, © 2006 Lippincott Williams & Wilkins. All rights reserved.
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