A patient presents complaining of left eye discharge and eye…

A patient presents complaining of left eye discharge and eyes that were matted shut this morning. The patient denies changes in visual acuity, but states that he is afraid to put his contacts in. On physical examination you note erythematous conjunctivae and mucopurulent discharge of the left eye. The cornea is clear. Which of the following topical agents is the treatment of choice in this patient?