People with keratitis can see blurry because keratitis affects the transparency of the cornea. The cornea is blurred from the epithelial stroma to the endothelial layer, regardless of which layer is inflamed or edematous. If keratitis causes epithelial defects or stromal edema, light will enter the eye and refract unevenly, resulting in blurred vision. Keratitis must be treated regularly and formally or it will affect vision. The common types of keratitis are bacterial keratitis, viral keratitis or fungal keratitis. Based on the medical history and the condition of the cornea, we can diagnose what type of keratitis it is, and then we can choose the right eye drops and ointments for standardized treatment. It is recommended not to order eye drops and ointments on your own before a clear diagnosis is made, as this may delay the condition.