After instilling ointment into the lower eye cul-de-sac, what instruction should the nurse give the patient?

The correct instruction after instilling ointment into the lower eye cul-de-sac is to close the eyes for about 1 minute. This action allows the medication to remain in contact with the ocular surface, facilitating better absorption and ensuring that the therapeutic effects of the ointment are maximized. By keeping the eyes closed, the patient can also minimize the risk of the ointment being washed away by blinking or tearing, which can occur if they immediately open their eyes or blink frequently.

Closing the eyes encourages relaxation of the eyelids, providing a stable environment for the drug to work effectively. It also helps to spread the ointment over the conjunctiva and cornea, further enhancing absorption and therapeutic efficacy. This method ensures that the ointment can act over a more extended period, which is essential for achieving the desired results in managing various eye conditions.