Dr. Mark is a fellow University of Houston grad. I came back here after having a pretty bad experience with the optometrist at my office. He is very personable and is knowledgeable about the contact lenses that are available today. They have a wide variety of contact samples available. I like that he is willing to discuss contact lens options I've researched on my own without just dismissing my questions. This is the second time I've used Dr. Mark but I plan on continuing to use him in the future as long as he is still practicing. Also, his hours are very convenient as he is open on Saturdays, which is somewhat uncommon. The selection of frames available is also very good, although I do not wear glasses much, I still wanted a new pair to have as a just in case.