Allergic conjunctivitis history and symptoms

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Overview

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.

History and Symptoms

Clinical History

Allergic conjunctivitis is frequently characterized by a personal history of allergies and/or atopy and occurrence of similar episodes in the past. Itchiness and diffuse bulbar and tarsal conjunctival injection are the most commonly reported symptoms and almost univerally present in all the subtypes.