Herpes simplex keratitis is a medical condition caused by the herpes simplex virus, which affects the cornea of the eye and can result in pain, inflammation, and vision impairment. Synonyms for herpes simplex keratitis include corneal herpes, virus keratitis, herpetic keratitis, or ocular herpes. These terms all describe the same viral infection that affects the cornea. It is essential to understand that herpes simplex keratitis is a serious condition that can cause damage to the eye if left untreated. Therefore, anyone who suspects they may have this condition should seek medical attention immediately to receive appropriate treatment and prevent complications.