Conjunctiva

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Conjunctiva
The upper half of a sagittal section through the front of the eyeball. (Label for 'Conjunctiva' visible at center-left when expanded.)
Horizontal section of the eyeball. (Conjunctiva labeled at upper left.)
Gray's	subject #227 1026
MeSH	A09.371.192

The conjunctiva is a membrane that covers the sclera (white part of the eye) and lines the inside of the eyelids. It helps lubricate the eye by producing mucus and tears, although a smaller volume of tears than the lacrimal gland. (London Place Eye Center, 2003).

[edit] Histology

The conjunctiva is typically divided into three parts:

1. Palpebral or tarsal conjunctiva: The conjunctiva lining the eyelids.
2. Fornix conjunctiva: The conjunctiva where the inner part of the eyelids and the eyeball meet, the palpebral conjunctiva is reflected at the superior fornix and the inferior fornix to become the bulbar conjunctiva.
3. Bulbar or ocular conjuctiva: The conjunctiva covering the eyeball, over the cornea and sclera. This region of the conjunctiva is bound tightly and moves with the eyeball movements.

[edit] Diseases and disorders

Main article: List of eye diseases and disorders

Disorders of the conjunctiva and cornea are a common source of eye complaints. The surface of the eye is exposed to various external influences and is especially suspectible to trauma, infections, and allergic reactions. Degeneration and dystrophia are less common causes of problems. The conjunctiva is best known because of its inflamed state, conjunctivitis (more commonly known as pinkeye). Conjunctival irritation is one of the adverse health effects that can take place after overexposure to VOCs (Volatile Organic Chemicals).

[edit] References

• London Place Eye Center (2003). Conjunctivitis. Retrieved July 25, 2004.
• Medicinenet.com (1999). Conjunctiva. Retrieved July 25, 2004.

[edit] See also

• Pinguecula
• Pterygium

[edit] External links

• Diagram at Loyola