A nurse is reinforcing teaching with a client with bacterial conjunctivitis of the right eye, and a prescription for an antibiotic ophthalmic ointment. Which of the following statements should the nurse make?

The correct answer is C: "Apply the ointment in a thin line into the conjunctival sac." This is the correct statement because applying the ointment in a thin line into the conjunctival sac ensures proper delivery of the medication to the affected area. The conjunctival sac is the space between the eyelid and eyeball where the ointment can be absorbed effectively. Wiping from the outer to the inner canthus (choice A) is not recommended as it can introduce contaminants into the eye. Using a sterile glove and applicator (choice B) is unnecessary and can be cumbersome for the client. Keeping the eye open for 30 seconds after instilling the ointment (choice D) may not be necessary and can lead to discomfort.