Some patients are only candidates for PRK. When we look at our patient base, approximately 20% of the patients we see are candidates for PRK, and the other 80% of the patients that we operate on are Lasik patients. There are a variety of reasons why someone might be a better candidate for PRK. The most important reason is usually corneal thickness. If the cornea is not thick enough for us to make a Lasik flap, then we’re going to opt for PRK because it is a safer procedure for that particular patient. Also, if the cornea has a curve in it that we deem to be less safe for us to make that flap, again, in Lasik, then we will opt for PRK. Lastly, if the cornea has a surface abnormality, we may also opt for PRK. There are also certain occupations and hobbies, such as martial arts, which lend themselves better for PRK. We do a lot of law enforcement with PRK, and it’s usually because of the fear of getting involved in a fight where the face or the eyes may get hit or banged in the early post-operative period, thereby causing some damage to the flap. For this reason, we opt for PRK in these patients as well.