Exam 4 Review:  Chapter 15:  Segments & Chambers of the Eye

anterior segment (of eye) - That part of the eyeball anterior to the lens, filled with aqueous humor and the location of the iris and ciliary body; it is divided into two parts, the anterior and posterior chambers, which are connected by the opening of the pupil.

anterior chamber - The space in the anterior segment of the eye, filled with aqueous humor, bounded anteriorly by the cornea and a small portion of the sclera and posteriorly by a small portion of the ciliary body, the iris, and that part of the crystalline lens which presents through the pupil.

posterior chamber - The space in the anterior segment of the eye, filled with aqueous humor, bounded anteriorly by a small portion of the ciliary body, the iris, and by that part of the lens which is distal to the portion which presents through the pupil and bounded posteriorly by the vitreous humor.

aqueous humor - The clear, watery fluid which fills the anterior and posterior chambers of the anterior segment of the eye; it surrounds the lens and is involved in the metabolism of the cornea and the lens.

posterior segment (of eye) - That part of the eyeball posterior to the lens, filled with vitreous humor and filling the space above the retina.

vitreous humor - The microfibrillar net-like structure which is filled with a very thick, gel-like substance containing mucopolysaccharides and hyaluronate acids; it fills the posterior segment of the eye; it functions to maintain the shape of the eye, keeping the retina pressed against the inner surface of the eye and it also cushions the contents of the eye from shocks such as from running or turning of the head.

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