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Zonules are fibers or small threads that suspend the lens of the eye from the ciliary body and hold it in position. These fibers are arranged in a radial pattern.

Normally when we focus on a close object (such as a book), the muscle pulls on the zonules, which pull on the edges of the lens causing it to become thicker in the center, increasing its power to allow you to read. If changes occur in the zonules, causing them to be moore loose, presbyopia can result.


The use of the chemical lysis of the zonules to facilitate removal of the lens during cataract surgery.
The Eye Encyclopedia is a collection of eye care terminology created by practicing optometrists and ophthalmologists. The information provided is not intended to be a substitute for regular medical care or to diagnose or treat any medical condition, and should be used only as a supplemental source of information. Please consult your doctor if you have any questions or concerns about your eye health.