Specializing in: Mascular Degeneration ~ Diabetic Retinopathy ~ All Forms Medical & Surgical Diseases of the Retina & Vitreous. Fellowship Trained, Board Certified Physicians: Mark E. Chittum, M.D. ~ Jonathan G. Williams, M.D. ~ James K. Luu, M.D. ~ Operating in Southern Colorado Since 1987 ~ Located in the Audubon Medical Campus.in Colorado Springs. Call us for your medical eye concerns. We have four retinal specialists operating in Southern Colorado since 1987.