This document provides information on the workup and treatment for two types of keratitis - bacterial keratitis and herpes simplex keratitis. For bacterial keratitis, the summary describes taking a history, examining visual acuity and the eye externally and with a slit lamp, checking IOP, performing syringing and dilating the eyes. Microbiological investigation includes corneal scraping and culturing. For herpes simplex keratitis, the summary outlines taking a history, examining visual acuity and the eyes externally and with a slit lamp, checking corneal sensation and doing a rose bengal stain. Signs of herpes keratitis include dendritic epithelial lesions and stromal edema.