What is the most likely symptom of bilateral allergic conjunctivitis?

Bilateral allergic conjunctivitis is characterized by inflammation of the conjunctiva, often resulting in noticeable swelling and redness. One of the hallmark symptoms of this condition is chemosis, which is the swelling of the conjunctiva. This condition frequently presents with a cobblestone appearance due to the formation of papillae as a response to the allergen. These symptoms arise from an allergic reaction where histamine and other inflammatory mediators cause vascular dilation and increased permeability in the conjunctiva, leading to the characteristic swelling and appearance.

While unilateral eye pain, scant mucoid discharge, and visual disruption can occur in other types of conjunctivitis or ocular conditions, they are not typically associated with bilateral allergic conjunctivitis. In allergic conjunctivitis, the degree of irritation and the nature of discharge tends to differ from conditions such as viral or bacterial conjunctivitis, emphasizing the distinct presentation of symptoms in allergic cases.