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Allergic conjunctivitis information


Allergic eye disease
Illustration of allergic conjunctivitis
SpecialtyOphthalmology, allergology Edit this on Wikidata

Allergic conjunctivitis (AC) is inflammation of the conjunctiva (the membrane covering the white part of the eye) due to allergy.[1] Although allergens differ among patients, the most common cause is hay fever. Symptoms consist of redness (mainly due to vasodilation of the peripheral small blood vessels), edema (swelling) of the conjunctiva, itching, and increased lacrimation (production of tears). If this is combined with rhinitis, the condition is termed allergic rhinoconjunctivitis (ARC).

The symptoms are due to release of histamine and other active substances by mast cells, which stimulate dilation of blood vessels, irritate nerve endings, and increase secretion of tears.

Treatment of allergic conjunctivitis is by avoiding the allergen (e.g., avoiding grass in bloom during "hay fever season") and treatment with antihistamines, either topical (in the form of eye drops), or systemic (in the form of tablets). Antihistamines, medications that stabilize mast cells, and nonsteroidal anti-inflammatory drugs (NSAIDs) are generally safe and usually effective.[2]

  1. ^ Bielory L, Friedlaender MH (February 2008). "Allergic conjunctivitis". Immunol Allergy Clin North Am. 28 (1): 43–58, vi. doi:10.1016/j.iac.2007.12.005. PMID 18282545. S2CID 34371872.
  2. ^ Cite error: The named reference Ono was invoked but never defined (see the help page).

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