Dr. Byrnes obtained his Doctor of Optometry Degree from the New England College of Optometry in Boston, Massachusetts and currently maintains a primary eye care private practice in Londonderry, New Hampshire. Dr. Byrnes specializes in the treatment of keratoconus and other conditions of the eye that require specialty contact lenses. Apart from lecturing internationally, Dr. Byrnes is a pioneer in current scleral lens design. He routinely participates in clinical studies and is an Academic Consultant to schools and colleges of Optometry for Bausch & Lomb and Polymer Technology Corporation.