Dr. Guiley is a native of Eugene, Oregon. He received his B.S. Degree from The University of Oregon, and both his Masters Degree in Public Health Biomedical Laboratory Science and his Doctor of Optometry Degree from The University of California at Berkeley. He has a special interest in the nutritional prevention and treatment of eye diseases, particularly macular degeneration.

Dr. Guiley is a frequent lecturer, including continuing education classes for other eye doctors on topics such as “The Role of Lutein in Macular Degeneration”, “When LASIK Goes Badly”, “Review of Immunology”, “Treatment of Motion Sickness and Vertigo” and “Detection and Treatment of Eye Coordination Problems”. He now teaches a two-day course entitled, “Glaucoma; Medical Management and Surgical Co-Management.” He served as a board member, Bulletin Editor and President-elect of the Los Angeles County Optometric Society and as the President of the Central Oregon Optometric Physicians Society. He also served as Chairman of the Bend Chamber of Commerce Governmental Affairs Council and as a member of the Bend Chamber's Board of Directors.

Dr. Guiley is an Adjunct Assistant Clinical Professor at Pacific University College of Optometry in Forest Grove, Oregon. Riverbend Eyecare has been selected by Pacific University as an externship-training site for optometry interns in their final year.