Dr. Thomas John is a world renowned ophthalmic surgeon. He is one of the world leaders in lamellar corneal surgery with three textbooks that he has edited on
lamellar keratoplasty. He has trained other corneal surgeons from the United States and from other parts of the world in DSAEK surgery. He is a Clinical Associate Professor, Loyola University at Chicago, and is in private practice in the suburbs of Chicago, namely, Tinley Park and Oak Lawn, Illinois. He is the Editor-in-Chief of the journal Techniques in Ophthalmology, a journal that deals with various ophthalmic surgical techniques and is the Associate Editor of the journal Annals of Ophthalmology. He is the Editor of the column Corneal Dissection in Ocular Surgery News. He is also on the editorial boards of other ophthalmic publications. He has received the Honor Award and Senior Achievement Award from the American Academy of Ophthalmology (2009) for his contributions in the field of ophthalmology. He was an invited speaker from the United States, invited by prestigious ophthalmic societies to other countries in the world including Italy, Finland, Peru, India, Greece, and Serbia. He has given numerous presentations both in the United States and around the world. He is a patent holder, and the inventor of many advanced corneal surgery instruments for lamellar keratoplasty procedures and device for eye surgery.