There are several types of keratitis, so it is necessary to prescribe the right medication: 1, bacterial: If the keratitis is bacterial, according to the condition, use 0.25% of chloramphenicol, 0.1% of rifampin, 0.5% of lincomycin, as well as gentamycin, tetracycline, erythromycin ophthalmic ointment, etc. For more serious ulcerative keratitis, a variety of broad-spectrum antimicrobial agents can be used, alternating in turn; 2, viral: to use 0.1% of Herpes net, 0.1% of virazole, 0.1% of cytarabine, trifluoro thymidine nucleoside, ganciclovir ophthalmic gel, interferon and other drugs; 3, fungal: fungal can be used for mycobacterial, or use 0.5%-1% of miconazole, 0.1%-0.25% of amphotericin B, 0.1% of flucytosine, 1.0% of clotrimazole eye drops, as well as gold and brown ophthalmic ointment .