Choun-Ki Joo MD, PhD is a Prof. of department of Ophthalmology, College of Medicine, The Catholic University of Korea. He completed research fellowship (1992~1994) of cornea and external disease for 2 years at Washington University in USA after finishing residency training (1988) in Korea. Prof Joo has a reputation for his basic and clinical knowledge in the field of cornea/external disease and refractive surgery. He is a frequent invited lecturer at international meetings, and over the past five years has directed one of the most prestigious training programs for specialists in refractive surgery. Prof Joo is the author of many articles in basic and clinical science. Prof Joo is the Director of Laboratory for Ophthalmology & Visual Science. Prof Joo has attracted much attention for his dedication to his patients and helping those in need. His clinical interests include corneal transplantation, refractive surgery and cataract surgery.