Meridional fibers [F. Meridionales Musculi Ciliaris, Pna; F. Meridionales (Bruckei), Bna; Syn.: Brucke Fibers, Brucke Muscles]

Meridional fibers are muscle fibers located in the meridional direction in the outer part of the ciliary muscle. They play an important role in the functioning of the eye and help regulate the tension of the lens capsule, which allows the eyes to focus on different objects.

Meridian fibers are located in the outer shell of the ciliary muscle, which is one of the main components of the eyeball. When the meridional fibers contract, the ciliary muscle can change its length, which affects the shape of the lens and allows the eye to focus at different distances.

In addition, meridional fibers are also involved in the regulation of intraocular pressure, which helps maintain normal functioning of the eye. With an increase in intraocular pressure, the meridional fibers begin to contract, which leads to a decrease in the volume of the eye and a decrease in pressure.

Thus, meridional fibers play an important role in the functioning of the eye and are an important component of its normal functioning.

Brücke fibers are part of the ophthalmic fiber system located in the iris of the eye. They are located under the ciliary fibers, between the midline of the iris and the outer edge of the pupillary margin. They are muscles consisting of fibers of the oculomotor nerve that cause contraction of the lens capsule and, consequently, contraction of the eyeball.

These fibers provide mobility to the lens in the eye and regulate the diameter of the eye, allowing a person to see objects clearly as lighting conditions change. When Brücke fibers are stimulated, they relax the ciliary