Olopat OD Eye Drops 3 ml is an antihistamine, which is primarily used to treat the signs and symptoms of seasonal allergic conjunctivitis. It is also used to treat itching and redness in the eyes caused by pollen, ragweed, grass, animal hair, or dander. Allergic conjunctivitis is an allergic reaction-induced inflammation of the conjunctiva (the clear tissue that covers the white part of the eye and the inside of the eyelids).Disclaimer:For More Information Contact Your Physician