Dr. Riddle is a Board-Certified ophthalmologist who has been practicing since 1977. He completed his undergradute work at Creighton University in 1967, and graduated from Creighton Medical School in 1971. He completed his internship at Letterman General Hospital, then served in the United States Air Force from 1971 through 1974. Upon completing his service, Dr. Riddle underwent his residency in ophthalmology at the Medical College of Wisconsin, graduating in 1972.
Dr. Riddle has completed four fellowships in ophthalmology: Cornea and External Disease at the University of Florida; Cornea and External Disease at Louisiana State University; Ophthalmic Pathology at the Armed Forces Institute of Pathology; and Vitre-Retinal Disease at the Vitreo-Retinal Research Foundation. He has been certified by the American Board of Ophthalmology since 1978.