Keratitis means there is inflammation of the cornea. There are many possible causes of Keratitis following a PRK treatment, both infectious and non-infectious. infectious keratitis is potentially a devastating complication of PRK, as an organism, usually a bacteria or fungus, causes ulceration. Thankfully this is very rare and only occurs infrequently. Antibiotic drops are routinely prescribed post PRK, and carefully following post op instructions greatly reduces this risk. Other types of keratitis are much more common after PRK, with the most common being inflammation from a dry surface. The surface has to heal after PRK, and this can take several weeks. During this period, and for several weeks beyond as well, it is important to lubricate the eyes frequently, and possibly use other supplements, including flax seed oil, omega three oils, and a prescription for the dry eye called Restasis. Thankfully all types of keratitis following PRK are most frequently treatable and temporary.