###Human: Will Cortisone drops used for corneal herpes cause any harmful effect? ###Assistant: Hello. Please do not panic. You will not go blind. I assume this is herpes simplex and you have herpes epithelial keratitis. Epithelium keratitis is usually treated with antiviral and lubricating eyedrop. The steroid has no role in epithelial keratitis. Steroid increases the risk of recurrence. That is why steroid is instilled undercover of antiviral. If there are more than two attacks in a single year, then we may need to continue prophylactic oral Acyclovir for a very long period (maybe years). With recurrent attacks, there may be scars which may blur your vision.