Willcockson Eye Associates originated in 1950 when Dr. Thomas H. Willcockson started his practice in Yankton, South Dakota. Dr. John R. Willcockson joined his father in the practice of ophthalmology in 1975. Both have now retired - Tom in 1991 and John in 2006. Dr. Patrick H. King joined the practice in 1983 and retired in 2013. Dr. Paula A. Hicks joined the practice in 1994, Dr. Gregory A ....