Ciprofloxacin eye drops and ointment are used to treat bacterial eye infections. They work by helping to kill the bacteria which are causing the infection.Eye infections are a common cause of conjunctivitis. In conjunctivitis, your eye becomes inflamed, feels gritty, and may water more than usual. The white of your eye may look red, and your eyelids may become swollen and stuck together with a discharge when you wake up in the morning. Only one eye may be infected to begin with, but it often spreads to both eyes. Most cases of infective conjunctivitis clear within a week or so without treatment. For more severe infections, or for infections which do not clear on their own, an antibiotic eye drop such as ciprofloxacin is used.Ciprofloxacin is also prescribed to treat corneal ulcers, which is when an ulcer forms on the delicate layer covering the surface of your eye.