Zonule of Zinn
The zonule of Zinn (after Johann Gottfried Zinn
Johann Gottfried Zinn
Johann Gottfried Zinn was a German anatomist and botanist member of the Berlin Academy.- Biography :Johann Gottfried Zinn was born in Schwabach....

) is a ring of fibrous strands connecting the ciliary body
Ciliary body
The ciliary body is the circumferential tissue inside the eye composed of the ciliary muscle and ciliary processes. It is triangular in horizontal section and is coated by a double layer, the ciliary epithelium. This epithelium produces the aqueous humor. The inner layer is transparent and covers...

 with the crystalline lens
Lens (anatomy)
The crystalline lens is a transparent, biconvex structure in the eye that, along with the cornea, helps to refract light to be focused on the retina. The lens, by changing shape, functions to change the focal distance of the eye so that it can focus on objects at various distances, thus allowing a...

 of the eye
Human eye
The human eye is an organ which reacts to light for several purposes. As a conscious sense organ, the eye allows vision. Rod and cone cells in the retina allow conscious light perception and vision including color differentiation and the perception of depth...


The zonule of Zinn is split into two layers: a thin layer, which lines the hyaloid fossa
Hyaloid fossa
The hyaloid fossa is a depression on the anterior surface of the vitreous body in which lies the lens. The name hyaloid fossa is synonymous with patellar fossa....

, and a thicker layer, which is a collection of zonular fibers. Together, the fibers are known as the suspensory ligament of the lens.

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