One of the common things that happens is that the patient comes in carrying a bag full of glasses, complaining that none of them work. They’ve seen three different eye doctors and they’re really struggling. One of the things on the list of potential problems is that the patient might have diabetes. What happens in the diabetics is that when their sugar is not well controlled, the lens of their eye kind of swells and then gets a little thinner so that their prescription is just changing all over the place. It’s really important for these patients to get their sugar under nice control and then it makes it a lot more reliable to prescribe a pair of glasses.