What is the function of zonular fibers?

The zonular fibers anchor the the equator of the lens and adjacent anterior and posterior surface of the lens to the ciliary body and and ciliary part of the retina.

What is the function of ciliary muscle and zonular fibers?

When the ciliary muscle contracts, it pulls itself forward and moves the frontal region toward the axis of the eye. This releases the tension on the lens caused by the zonular fibers (fibers that hold or flatten the lens).

What are zonular Fibres collectively known as?

The zonule of Zinn is split into two layers: a thin layer, which lines the hyaloid fossa, and a thicker layer, which is a collection of zonular fibers. Together, the fibers are known as the suspensory ligament of the lens. The zonules are primarily made of fibrillin, a connective tissue protein.

What does the ciliary Zonule do?

Ciliary zonules are a ring of fibrous structures anchoring the ciliary body with the lens of the eye. These are the structures that help to maintain the position of the lens in the optical path, and anchor muscles that change the shape of the lens to alter focus.

What is the ciliary body in contact with?

The ciliary body is the second component of the anterior uvea, and continues posteriorly with the choroid. The ciliary body has contact with both anterior and posterior chambers, the sclera externally, the lens and vitreous internally, and the retina and choroid posteriorly (Fig. 9.9).

How does the ciliary muscle affect the zonular fibers?

According to Hermann von Helmholtz’s theory, the circular ciliary muscle fibers affect zonular fibers in the eye (fibers that suspend the lens in position during accommodation), enabling changes in lens shape for light focusing.

Where are the fibers of the zonule located?

The zonule is split into two layers: a thin layer which lines the hyaloid fossa and a thicker layer which is a collection of zonular fibers. Collectively, the fibers are known as the suspensory ligament of the lens. The zonular fibers pass over the ciliary body and are attached to the capsule of the lens a short distance in front of its equator.

Where is the zonule of the ciliary eye?

The upper half of a sagittal section through the front of the eyeball. (Zonule of Zinn visible near center.) The zonule of Zinn ( / ˈtsɪn /) ( Zinn’s membrane, ciliary zonule) (after Johann Gottfried Zinn) is a ring of fibrous strands forming a zonule (little band) that connects the ciliary body with the crystalline lens of the eye.

What makes a zonular cable an elastic cable?

Zonular fibers are viscoelastic cables but their component microfibrils are rather stiff structures. Thus, the elastic properties of the fibers likely stem from lateral interactions between microfibrils.