The word "annulus ciliaris" is a scientific term referring to a circular structure around the lens of the eye. The pronunciation of this term is [æˈnjuːləs sɪˈlɛərɪs], where the first syllable, "an," is pronounced as "æn" and the "u" in "ulus" is pronounced as "ju." The "ci" in "ciliaris" is pronounced as "sɪ," while the final "is" is pronounced as "ɪs." Despite its complex spelling, a clear understanding of its phonetic breakdown will help ensure proper pronunciation.
The term "annulus ciliaris" refers to a specific anatomical feature found in the eye. The word "annulus" comes from the Latin for "ring," while "ciliaris" refers to the ciliary body. The annulus ciliaris, or ciliary ring, is the circumferential region located within the eye, positioned around the outer edge of the iris.
An important part of the eye's anatomy, the annulus ciliaris is responsible for various functions related to vision. One of its primary roles is to provide support and structure to the lens of the eye. It aids in the accommodation process, which allows the lens to change its shape and focus on objects at varying distances. The annulus ciliaris achieves this by controlling the movement of the ciliary muscles, which consequently alters the curvature of the lens.
Additionally, the annulus ciliaris plays a crucial role in the production and regulation of aqueous humor, the fluid that fills the front portion of the eye. The ciliary body within the annulus ciliaris contains many small blood vessels that help nourish the eye and ensure optimal optical functioning. It also participates in the drainage of aqueous humor, maintaining stable intraocular pressure.
Overall, the annulus ciliaris is a fundamental anatomical structure of the eye that contributes to several vital functions related to vision, accommodation, and the maintenance of intraocular pressure.
The periphery of the iris.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
The word annulus ciliaris has its roots in Latin.
- Annulus comes from the Latin word annulus, meaning ring or circle.
- Ciliaris is derived from the Latin word cilia, referring to the eyelashes.
Combining these two terms, annulus ciliaris essentially means ciliary ring or ring of eyelashes.