David Joel Baker, MD, MPH David Joel Baker, MD, MPH, is an ophthalmologist with AHN Surgery Institute, specializing in cataract surgery. He has experience in care and treatment of diabetic retinopathy, glaucoma, and cataract. Dr. Baker went to medical school at University of Michigan in Ann Arbor, Michigan. He did a family practice internship at Shadyside hospital in Pittsburgh, Pennsylvania and his residency in ophthalmology at State University of New York at Buffalo in Buffalo, New York. Dr Baker is certified by the American Board of Ophthalmology and is affiliated with the American Academy of Ophthalmology and the Pittsburgh Ophthalmology Association. He sees patients ages 5 and older.