Firstly, keratitis can be considered to be caused by bacterial or viral infections, with bacterial keratitis being more common. In such cases, we can first use saline or warm boiled water to rinse the cornea clean, and then apply eye drops, specifically antibacterial and anti-inflammatory ones, such as Tobramycin Eye Drops. Apply three to four drops, three to four times a day, and continue for three to five days. The symptoms of keratitis will then alleviate.