What is the first line treatment for allergic conjunctivitis?

The primary treatment for allergic conjunctivitis is antihistamine eye drops. These medications work by blocking the effects of histamine, a chemical released during allergic reactions that contributes to symptoms such as itching, redness, and swelling of the conjunctiva. By directly targeting the underlying cause of the allergic response, antihistamine eye drops provide quick relief from the discomfort associated with allergic conjunctivitis.

Cold compresses may help alleviate symptoms temporarily but do not address the underlying allergic reaction. Steroid eye drops can be effective for more severe allergic reactions but are typically reserved for cases that do not respond to first-line treatments or are chronic due to their potential side effects with long-term use. Artificial tears can provide moisture and wash away allergens but do not directly affect the allergic mechanism, making them less effective as a primary treatment for alleviating symptoms. Thus, antihistamine eye drops are the most suitable and effective first-line option for managing allergic conjunctivitis.