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Richard E. Castillo, OD, DO
Executive Director (President)


Richard E. Castillo, OD, DO has been NSU-OCO’s Chief of Surgical Services and principle surgeon for over two decades. Serving his community as an Optometric Physician and Ophthalmologist, he is a past recipient of the OAOP’s Distinguished Service Award, an award from the Oklahoma State Board of Examiners in Optometry for outstanding contributions to the advancement of optometric surgical care, and a Special Citation from the Oklahoma House of Representatives for Contributions to the Advancement of Surgical Care in Oklahoma. Dr. Castillo is one of the founding members of NSU’s Advanced Procedures Course, contributing to optometric education nationwide since 1995. He maintains a very active national CME lecture schedule.

James Hunter, OD
Assistant Executive Director (Vice-President)


After education and training at the University of Illinois, Indiana University and Case Western Reserve , Dr. Hunter became a full time Assistant Professor and Clinic Director at the Indiana University School of Optometry. Following ten years in that capacity and establishing the School’s ocular therapeutics curriculum, in 1987 he left Indiana University to establish and become managing partner of Eye Specialists of Indiana – a high volume, by referral only, optometric medical and surgical referral center. 

Because of a desire to return to optometric education , in 2012 Dr. Hunter left his practice and surgery center to return to IUSO where he is now Professor and has established the School’s “Ophthalic Laser and Minor Surgical Procedures Course “. He teaches the laser portion of that course and teaches the School’s post op cataract portion of the IUSO curriculum. 

Dr. Hunter became a Fellow of the American Academy of Optometry in 1979, a full physician member of the ASCRS in 1995 and is board certified by the ABCMO. He has been a constant member of multiple NBEO committees and councils since 1979, currently serving as one of the six members of the initial NBEO “Laser and Surgical Procedures Examination Committee”. He has been on the Indiana Optometry Board since 2004 , is Indiana’s ARBO representative and served on ARBO’s initial Continuing Competency Committee.

Clifford Caudill, OD


A Lexington, KY native, Dr. Caudill received an undergraduate degree from the University of Kentucky in 1991 and his optometry degree from the University Of Alabama School Of Optometry in 1995. He completed a residency in Primary Care Optometry at the Northeastern State University College of Optometry in Tahlequah, OK in 1996. After practicing in the Chattanooga, TN area for several years in private practice and as Assistant Center Director for Omni Eye Services of Chattanooga, he returned home and joined the faculty of the University of Kentucky Department of Ophthalmology and Visual Sciences in 2003 providing primary eye care and serving as the optometric education coordinator and ocular disease residency director. In the spring of 2015, Dr. Caudill accepted the position of Director of Clinics at Kentucky’s own University of Pikeville, Kentucky College of Optometry; and currently serves as the Director of Clinics and Assistant Dean of Clinic Affairs designing and implementing a network of rural eye clinic services throughout eastern Kentucky. He is a fellow of the American Academy of Optometry, Board Certified by the American Board of Medical Optometry and the American Board of Optometry, and has received his Laser Certification from the Kentucky Board of Optometric Examiners.

Alissa Coyne, OD


Dr. Coyne received a Bachelor of Science degree in Biobehavioral Health from the Pennsylvania State University. She attended the Pennsylvania College of Optometry where she received her Doctor of Optometry degree in 2010. Dr. Coyne completed a one-year residency in primary care and ocular disease at The Eye Institute in Philadelphia, Pennsylvania. She is currently an Assistant Professor at the Pennsylvania College of Optometry at Salus University where she lectures in Ocular Pharmacology and leads the Ophthalmic Lasers laboratory. She is certified in Advanced Procedures through NSUOCO. Dr. Coyne’s interests include ophthalmic lasers, ocular disease, emergency eye care, and ocular pharmacology. She has lectured nationally and internationally. She is a Fellow of the American Academy of Optometry.

Elizabeth Wyles, OD
Director of Collaborative Infrastructure

Dr. Elizabeth Wyles is an Associate Professor at the Illinois College of Optometry (ICO). She received her optometry degree from the Southern California College of Optometry (Marshall B. Ketchum University) and completed a residency in Hospital Based Primary Care Optometry at the Crownpoint Indian Health Care Facility in Crownpoint, New Mexico. Prior to arriving at ICO, Dr. Wyles was in private practice and taught in both the didactic and clinical programs at Pacific University College of Optometry (PUCO). Dr. Wyles is an attending optometrist in the Primary Care and Advanced Care Services of the Illinois Eye Institute working with 1st, 2nd, 3rdand 4thyear students. She teaches the Ocular Anatomy and Retina courses. She developed the Injections course in 2008 and the Minor Surgical Procedures for Optometrists course in 2009. To date, she continues to teach in the labs. Additionally, she leads the development of the preparatory Part 2 national board exam course for KMK Educational Services. She has authored posters and papers in optometric and educational journals, presented continuing education courses nationally and internationally and has co-authored a chapter in a textbook. She has over 15 years of experience with optometric curriculum development and has a passion for education and learning. Her commitment to quality education has been recognized by receiving multiple teaching awards from the students at both PUCO and ICO. She has extensive experience with national optometric standardized testing, as an item writer, committee and council member. Dr. Wyles is a fellow of the American Academy of Optometry and a member of the American Optometric Association.



Paul Peng
Paul H. Peng, OD, MA, JD

Dr. Peng received his doctorate of optometry degree and masters in education from the University of California, Berkeley.  He also received his law degree from JFK University, Orinda, California.  Paul has been an optometric educator  since the late 80's and continues til this day.  He retired as an Associtate Clinical Professor from UC Berkeley, and is currently an adjunct faculty at Marshall B. Ketchum University, Southern California College of Optometry.  Paul has extensive experience in distance education and telemedicine.