About Us


Brad Williams, OD, FAAO

Professional Experience:
  • September 1965 to October 1972: Private Practice
  • November 1972 to September 1978: One of several Marketing Directors for American Optical Contact Lens Division
  • July 1979 to December 2001: Private Practice
  • June 1986 to October 2012: Founder, President and Former CEO of Williams Group
  • Since October 2012: Fulfilling speaking engagements for state, regional and national conference meetings. Also, working with three co-owners providing a one-of-a-kind online education and training center called Take10Vision.com

View Curriculum Vitae

Dr. George Foster

George Foster, OD

Dr. Foster received his Doctor of Optometry degree from the University of Houston and his Bachelor of Arts degree from Northeastern State University in Tahlequah, OK. Before assuming the helm as Dean of the Oklahoma College of Optometry at NSU (1995 – 2008), Dr. Foster was in primary practice for 29 years in Bristow, OK. He was instrumental in the development of the Northeastern State University Oklahoma College of Optometry in Tahlequah which began in the fall of 1979. Dr. Foster is a charter member of Tahlequah Lions Club and served as its first president. He is presently Chairman of the Cherokee County Health Services Council (the only county health authority in Oklahoma). Because of the Council’s efforts, a new federally qualified health center was formed in rural Cherokee County as well as many other local health promotions. He serves as the Chair for the NSU Rural Health Institute which is a part of the Oklahoma Center for Rural Development.

Dr. Foster has served as the secretary/treasurer of the Oklahoma State Board of Examiners. He was a board member and past Chair of the Oklahoma Institute of Child Advocacy. He was a board member of the Oklahoma Tobacco Settlement Endowment Trust Fund (TSET) and the first Veterans Administration Affiliation Partnership Council. He also served on the NEI NEHEP and NEI VISION Public Affairs committees.

Dr. Foster actively serves in optometry organizations on the state and national level.

Dr. Kathleen Elliott

Kathleen Elliott, OD, Dipl.ABO

Dr. Elliott is a graduate of NSUOCO. She completed a residency in Ocular Disease and went on to complete a two year Pediatric Optometry Fellowship in Tulsa, OK where she now practices.

Dr. Elliott also co-owned and operated a successful private practice and hospital based clinic in rural Oklahoma from 1998-2010. She has been CEO of Staff Training from A to Z, a web based training company providing tools in staff training . She is a successful continuing education speaker.

Dr. Elliott was recently appointed by Oklahoma’s Governor as the first female doctor to serve on the Oklahoma Board Of Examiners in Optometry , where she serves as Secretary-Treasurer. She is the former Co-Chair of the state Legislative Committee and was named the Oklahoma Legislative Physician of the year for 2012.  She received the Oklahoma Optometrist of the Year Award for 2014.

Dr. Richard Castillo

Richard E. Castillo, OD, DO


Dr. Castillo is a graduate of Northeastern State University’s Oklahoma College of Optometry as well as Oklahoma State University’s College of Osteopathic Medicine and Surgery. He completed a residency in Ophthalmology at the OSU Medical Center in Tulsa, OK where he served as chief resident.

Dr. Castillo has spent his entire professional career in Academia, serving as director of the Ophthalmology Clinic and a professor in the Department of Surgery at OSU, followed by his current position as professor, chief of surgical services, Assistant Dean for Surgical Training and Education, and Director of the Center for Advanced Practice Optometry at Northeastern State University’s Oklahoma College of Optometry.

Dr. Castillo has been NSU’s principle surgeon, practicing comprehensive medical and surgical ophthalmology and medical and surgical optometry since 1998. He is the author or co-author of several textbook chapters including the introductory chapter in the iconic Rosenbloom’s Vision and Aging, and Pfenninger and Fowler’s Procedures for Primary care, named one of the all time 100 most important books in medicine.

In 1997, Dr. Castillo introduced office-based radiosurgery to the profession of optometry, an office-surgical modality which has become commonplace in every single state that has adopted advanced practice legislation for optometric physicians.

Dr. Castillo has served on several committees for the National Board of Examiners in Optometry, and is a commission member, and chair of the National Commission on Vision and Health. Dr. Castillo has presented over 800-invited lectures both nationally and internationally.

In November, 2015 he conceived of and launched the NSU-OCO Center for Advanced Practice Optometry, a unique venue for educating and training Optometric Physician’s in advanced office surgical, anesthesia, laser, and diagnostic procedures. He is currently the Center’s director and oversees all aspects of the surgical training program. Dr. Castillo has served as a consultant to numerous Schools and Colleges of Optometry, State Optometry Boards and State Associations.

In the winter of 2014 he was presented a Special Citation from the Oklahoma House of Representatives for outstanding contributions to the advancement of optometry and surgical care in the state of Oklahoma. In 2015 the Oklahoma State Board of Examiner’s in Optometry presented him a similar award. In March of 2017, Dr. Castillo was presented with the Oklahoma Association of Optometric Physician’s Distiguished Service Award.

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