Different eye drops need to be used depending on the cause of the keratitis. For bacterial keratitis, you can use oxyfloxacin eye drops, or levofloxacin eye drops, tobramycin eye drops, etc. Fungal keratitis can be treated with 0.5% natamycin eye drops or amphotericin B eye drops. Viral keratitis can be treated with 0.1% acyclovir eye drops, or ganciclovir eye gel, or 0.1% cyclosporine eye drops. Some keratitis can be treated with glucocorticoid eye drops, such as tobramycin dexamethasone eye drops, flutemetron eye drops, and Bactrim eye drops.