Zonule of Zinn

Zonule of Zinn

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Illustration of the Zonule of Zinn

The Zonule of Zinn (also known as Zinn's membrane, Zinn's zonule, or Ciliary zonule) is a ring of fibrous strands forming a zonule (small zone) that connects the ciliary body with the crystalline lens of the eye. These fibers, which are made of a protein called fibrillin, are responsible for holding the lens in place.

History

The Zonule of Zinn was named after Johann Gottfried Zinn, a German anatomist who first described it in the 18th century.

Structure

The Zonule of Zinn is composed of a series of delicate, thread-like fibers that extend from the ciliary processes to the lens equator. These fibers are made of a protein called fibrillin, which provides strength and flexibility to the zonule.

Function

The primary function of the Zonule of Zinn is to hold the lens in place within the eye. It also plays a crucial role in the process of accommodation, which is the ability of the eye to adjust its focus from distant to near objects.

Clinical significance

Defects or damage to the Zonule of Zinn can lead to a variety of eye conditions, including ectopia lentis, glaucoma, and cataract. In some cases, surgical intervention may be necessary to repair or replace the damaged zonules.

See also

• Ciliary body
• Crystalline lens
• Accommodation (eye)