Has anyone ever noticed that if you enter an upper middle class neighborhood, you can find an Ophthalmologist in almost any medical building. If, however, you are in a poorer neighborhood, ophthalmologist are few and far between. My question is, what is the advantage one would have by practicing in a upper-middle class neighborhood as opposed to a poor neighborhood? Say, for example, Dr. A performs 10 cataract surgeries on 10 patients with private insurance, and Dr. B. performes 10 cataract surgeries on 10 patients with medicare. What advantage, if any, would Dr. A have over Dr. B? Inquiring minds want to know.