Optigent (Gentamicin) 3mg/ml (0.3% w/v) Ophthalmic/Otic Solution is an antibiotic solution used to treat bacterial infections of the eye and ear. The 5ml bottle contains Gentamicin, which works by preventing the growth of bacteria. It is commonly used for conditions like conjunctivitis (eye infections) and otitis (ear infections), with the solution being applied directly to the affected area as prescribed by a healthcare provider.