ORBICULUS CILIARIS Meaning and
Definition
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Orbiculus ciliaris, also known as the ciliary ring or ciliary body, is a circular structure located in the middle layer of the wall of the eye between the sclera and the retina. It plays a crucial role in the production and regulation of the aqueous humor, the clear fluid that fills the front part of the eye, and in adjusting the shape of the lens to facilitate focusing on objects at different distances.
The ciliary body consists of ciliary processes and a muscular ring called the ciliary muscle. The ciliary processes are radial extensions that form finger-like projections on the inner surface of the ciliary body. These processes secrete the aqueous humor into the eye and help in its circulation by maintaining the appropriate pressure levels.
The ciliary muscle, on the other hand, surrounds the lens and acts to change its shape. It consists of smooth muscle fibers that contract or relax to allow for accommodation, the adjustment of the lens to focus on near or distant objects. Contraction of the ciliary muscle leads to a thicker and more curved lens, enabling near vision, while relaxation of the muscle results in a thinner and flatter lens, allowing clear vision of objects at a distance.
Overall, the orbiculus ciliaris is essential for maintaining the fluid balance in the eye and for adapting the lens to achieve clear and sharp vision at different distances.
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Ciliary disc, the portion of the ciliary body adjoining the chorioid; it marks the transition in structure of the two tissues, the lamina choriocapillaris ceasing and the ciliary processes beginning.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Common Misspellings for ORBICULUS CILIARIS
- irbiculus ciliaris
- krbiculus ciliaris
- lrbiculus ciliaris
- prbiculus ciliaris
- 0rbiculus ciliaris
- 9rbiculus ciliaris
- oebiculus ciliaris
- odbiculus ciliaris
- ofbiculus ciliaris
- otbiculus ciliaris
- o5biculus ciliaris
- o4biculus ciliaris
- orviculus ciliaris
- orniculus ciliaris
- orhiculus ciliaris
- orgiculus ciliaris
- orbuculus ciliaris
- orbjculus ciliaris
- orbkculus ciliaris
- orboculus ciliaris
Etymology of ORBICULUS CILIARIS
The word "orbiculus ciliaris" is derived from Latin. Here's the breakdown of its etymology:
1. "Orbiculus" comes from the Latin noun "orbis", meaning "a circle" or "a disk". It is the diminutive form of "orbis" and thus translates to "a small circle" or "a small disk".
2. "Ciliaris" is an adjective derived from the Latin noun "cilia", plural of "cilium", which means "an eyelash". "Ciliaris" translates to "pertaining to eyelashes" or "relating to cilia".
Therefore, when combined, "orbiculus ciliaris" refers to a small circular structure or disk-shaped object associated with or related to eyelashes.
