Thomas John MD received his Cornea Fellowship in Boston, MA at the Harvard Medical School, Massachusetts Eye and Ear Infirmary, and Department of Ophthalmology. He also received his Ophthalmology Residency at the University of Pennsylvania School of Medicine, Scheie Eye Institute in Philadelphia, PA.

Dr. John is a former Director of Cornea Service, University of Chicago, The Pritzker School of Medicine, Department of Ophthalmology and Visual Science, Chicago, Illinois. Dr. John has many awards such as "America's Top Doctor 2004", "Chicago's Top Doctor 2004" and last but not least "America's Top Ophthalmologist, 2004."

Dr. John has also published a surgical video and has been an invited speaker to many prestigious ophthalmology conferences. He has also published numerous scientific articles in ophthalmology journals, presented papers at national and international meetings. He has taught surgical techniques to other ophthalmic surgeons, taught medical students and residents in ophthalmology training.