Klontar (Gentamicin Sulfate) 3mg/ml Ophthalmic/Otic Solution is an antibiotic used to treat bacterial infections in the eyes and ears. The 5ml bottle contains a 0.3% concentration of Gentamicin, which works by inhibiting bacterial growth. It is commonly used for treating eye infections such as conjunctivitis and ear infections like otitis, with the solution applied directly to the affected area as directed by a healthcare provider.