The ciliary body along with the iris and the choroid, are pigmented tissues that form the uveal tract of the eye. USMLERx.
The greater part of the sclera has been removed. … is set at infinity, the ciliary muscle relaxes, the muscle’s inside diameter is increased, more pull is exerted on the lens by the ligaments, and the front surface of the lens is flattened. Anatomy & Embryology of the Eye" (Chapter). Ciliaris muscle, muscle of the ciliary body of the eye, between the sclera (white of the eye) and the fine ligaments that suspend the lens. "QID: 22067". Get kids back-to-school ready with Expedition: Learn! Lee Ann Remington OD, MS, FAAO, in Clinical Anatomy and Physiology of the Visual System (Third Edition), 2012. Retrieved on 2010-01-16 from Dictionary.com, "-ary", in The American Heritage Dictionary of the English Language, Fourth Edition. The ciliary muscle is a ring of smooth muscle [3] [4] in the eye's middle layer (vascular layer) that controls accommodation for viewing objects at varying distances and regulates the flow of aqueous humor into Schlemm's canal.It changes the shape of the lens within the eye, not the size of the pupil [5] which is carried out by the sphincter pupillae muscle and dilator pupillae. Source location: Houghton Mifflin Company, 2004.
Source location: Random House, Inc. Reference.com.
One of the functions of the ciliary body is to produce aqueous humor, the fluid that fills the anterior and posterior chambers. "Anatomy and Physiology." MedIQ Learning, LLC. (Uveitis refers to inflammation of these structures.) It is composed of both longitudinal and circular fibres and serves to change the shape of the lens, enabling the eye to focus upon near or distant Gest, Thomas R; Burkel, William E. "Anatomy Tables - Eye." The main function of the ciliary muscles is to change the shape of the lens in the eye to help with focusing.
13 January 2010 "cilia", Unabridged. The ciliary effect is called accommodation (focusing the lens for near or far vision), and the rectus effect is called convergence (moving the entire eyeball). University of Michigan Medical School.
Source location: Random House, Inc. Reference.com.
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Ciliary Muscle. Le, Tao T.; Cai, Xumei; Waples-Trefil, Flora.
Medical Gross Anatomy. The ciliary fibers have circular (Ivanoff), longitudinal (meridional) and radial orientations. …two eye-muscle systems called the ciliary muscles and the rectus muscles.
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When near objects are viewed, the ciliary muscle contracts, the ligaments relax, and the lens, being elastic,…
Retrieved on 2010-01-16 from
While the main function of the ciliary muscle is related to accommodation, it is also critically involved in both conventional trabecular and unconventional uveoscleral aqueous humor outflow.
2000. The effect of… (2012). Ciliary muscle definition, the smooth muscle in the ciliary body, the action of which affects the accommodation of the eye. The ciliary muscle is an unstriped, involuntary, muscle concerned with alterations in the adjustments of focus—accommodation—of the optical system; the fibres run both across the muscle ring and circularly, and the effect of their contraction is to cause the whole body to move forward and to…
(Chapter 4) Riordan-Eva Paul, "Chapter 1. Interweaving occurs between fiber bundles and from layer to layer, such that various amounts of connective tissue are found among the muscle bundles.
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