Which condition would cause chronic eye itchiness and clear watery discharge?

Chronic eye itchiness accompanied by clear watery discharge is typically indicative of allergic conjunctivitis. This condition arises from the body's immune response to allergens such as pollen, pet dander, or dust mites, leading to histamine release and subsequent inflammatory symptoms in the conjunctiva. The itchiness is a hallmark sign of allergic reactions, and the discharge is usually thin, clear, and watery, distinguishing it from other forms of conjunctivitis, which might present with thicker or colored discharge.

In contrast, bacterial conjunctivitis tends to produce a purulent discharge, which is thicker and often yellow or greenish, along with redness and potential crusting of the eyelids. Viral conjunctivitis may cause watery discharge as well, but it is often associated with symptoms like a cold or respiratory infection and may not typically cause the same degree of itchiness. Contact lens infections can lead to irritation and potentially discharge but are usually characterized by more severe symptoms such as redness, pain, and possibly a thicker discharge related to the infection rather than purely an allergic response.

Understanding these distinctions is essential for properly diagnosing and managing eye conditions based on symptoms.