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Eye & Accessory Visual Structures


Tunica conjunctiva

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Structure and/or Key Feature(s)

The conjunctiva is a transparent mucous membrane that extends and covers the posterior surface of the eyelids. It then folds back on itself forming the fornices and extends over the eyeball, covering the sclera up to its junction with the cornea.

Anatomical Relations

The conjunctiva is continuous with the skin of the eyelids and with the lacrimal canaliculi and lacrimal sac.


The conjunctiva contains cells that produce mucus and tears that lubricate the eye. It also plays a defensive role in protecting the surface of the eyeball from infection.


Dorland, W. (2011) Dorland's Illustrated Medical Dictionary. 32nd edn. Philadelphia, USA: Elsevier Saunders.

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