Chloramphenicol ophthalmic ointment is mainly used topically for the treatment of superficial eye infections caused by sensitive bacteria and trachoma caused by Chlamydia trachomatis. Chlortetracycline ophthalmic ointment is a tetracycline derivative, which can kill pathogenic microorganisms by affecting the synthesis of proteins in the ribosomes of pathogenic microorganisms and play a bacteriostatic role, and is effective against chlamydia, mycoplasma, spirochetes, rickettsiae, and gram-staining-positive cocci and gram-staining-negative bacilli infections. Chrysomycin ophthalmic ointment is mostly used to treat conjunctivitis, keratitis, acute blepharitis, blepharitis and other diseases. In the process of application, personal cleanliness and hygiene should be observed. Before applying, use hand sanitizer to clean and disinfect your hands before taking the medicine and applying it, and pay attention to not contaminating the mouth of the medicine tube before and after use. At the same time, be sure to pay attention to the use of medication under the guidance of a doctor.