ciliary muscle


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ciliary muscle

[¦sil·ē‚er·ē ′məs·əl]
(anatomy)
The smooth muscle of the ciliary body.
References in periodicals archive ?
Chronologically, the pigmented and nonpigmented ciliary epithelial tissue develop first, followed by the ciliary processes and zonules, and finally the pars plana, ciliary body stroma, and ciliary muscles. (4) This sequence supports the absence of any affected tissue other than the defective ciliary pigment layer in our case.
Myopic patients having decreased ocular rigidity transmits greater force of contraction of ciliary muscles to the choroid and sclera.
Positive accommodation refers to the time required for the ciliary muscle to contract sufficiently to change the focus from distance vision to close-up or near vision.
Many theories attempting to describe the mechanisms regulating ocular growth only implicate changes in global processes, such as accommodation (contraction of the ciliary muscle to alter lens shape for near vision) or intraocular pressure as leading to myopia.
Six muscles around each eye control eye movements, and a ciliary muscle located behind each iris (the colored eye membrane) controls eye focus.
A portion of the aqueous outflow is through the longitudinal fibres of the ciliary muscle into the supraciliary-suprachoroidal space and out through the sclera.
(2) Although the lenticular theories propose age-related changes to the lens, capsule, and zonular fibres, the extralenticular mechanism includes ciliary muscle dysfunction, loss of elasticity in the posterior zonular fibres, and even decreased resistance of the vitreous against the lens capsule.
Sheppard and Davies [27] reported that the ciliary muscle becomes thicker with age, and they also observed an anterior-interior shift in the ciliary muscle mass.
The IOLs work by using the continued functionality of the ciliary muscle after cataract removal.
With chromium deficiency, less glucose can be drawn from the capillaries to fuel the ciliary muscles. Reduced ciliary muscle response reduces close-work eye focusing ability.