Antibiotic eye drops are routinely used in ophthalmology in the following categories: 1. aminoglycoside eye drops, routinely used is tobramycin eye drops, its compound preparations are tobramycin dexamethasone eye drops, butylamine kana eye drops. 2. quinolone eye drops, this eye drops generation is norfloxacin eye drops or ointment, the second generation has levofloxacin eye drops and levofloxacin eye ointment, the third generation has gatifloxacin, moxifloxacin eye drops and ointment. 3. macrolide eye drops and ointment, routinely used is erythromycin eye ointment or chlortetracycline eye ointment. 3. macrolide eye drops and ointment, erythromycin eye ointment or chrysomycin eye ointment are routinely used.