Betnesol Eye Ointment 5g contains the active ingredient betamethasone sodium phosphate, which is a type of medicine called a corticosteroid. It is used for the treatment of inflammation and swelling in the eyes, such as in allergic conjunctivitis, iritis, and uveitis. Betamethasone works by reducing inflammation and swelling in the eyes, which in turn helps to reduce redness, itching, and discomfort. It is important to use this medication as directed by a healthcare professional and to avoid prolonged use, as long-term use of corticosteroids can have side effects.