FCEM2-1400

FCEM2-1400

A 3-year-old boy is brought in by his father with a red and itchy right eye. On examination, there is mild redness of the conjunctiva, and small bumps are visible on the inside of the eyelid. The eyelid is swollen, and there are a few small red spots on the white part of the eye. The eye is watery, and there is no pus. He recently had a mild cold. You diagnose him with viral conjunctivitis.
According to the current NICE guidance, which of the following should NOT be included in the management of this patient?