###Human: I am suffering from corneal ulcer after PRK surgery. What is the treatment? ###Assistant: Hello. Indeed a corneal ulcer requires patience, time, and continuous monitoring until it is fully healed or scar forms. Sometimes it might take up to a year and more. It is however mandatory that you add to the list of eye drops that you are using a lubricant (artificial tears) because dryness is inevitable after any refractive surgery and once you are using eye drops that contain preservatives. You can use the lubricant every hour if you need but except the last hour before going to sleep. That is also very important if your job includes intense visual activities at the PC and or use of mobile devices. I wish you a fast recovery.