Committee Detail

Vision Science Committee


Committee Purpose, Scope and Documents

This Technical Committee researches and makes recommendations regarding how light effects human vision and the visual processes.

Included subject matter: The scope includes methods based on the visual effects of light sources in interior and outdoor applications. Excluded subject matter: This committee does not cover effects such as color rendering, color appearance, circadian rhythm, or other health considerations.



Committee Chair

Donna Gafford

Donna Gafford - Donna Gafford founded Defining Brilliance Consulting in 2020 to aid those in the lighting industry looking for education and lighting application support and guidance. Prior to becoming an independent consultant, Donna spent over a decade holding various roles in Marketing and Applications Engineering at Signify/Philips/Day-Brite Lighting. During her tenure she crafted education/brand awareness materials and events geared toward specifiers and agents alike. In addition, she developed and managed the entire company BIM (Building Information Models) strategy and constructed countless lighting designs to support sales agents. Donna holds an AAS in CADD and her BS in Organizational Leadership (Concentration: Project Management). In addition, she earned her lighting certification (LC) from NCQLP in 2010 and the Certificate of Management-Building Information Modeling (CM-BIM) from AGC in 2015. Always striving to become more active in the lighting industry, Donna has been member of the IES since 2014. Currently, she is Co-Chair of the Vision Science Committee and formal Chair of the BIM Committee.
Michael Royer
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Dr. Michael Royer is a senior engineer at the Pacific Northwest National Laboratory (PNNL), where he works on the Advanced Lighting Science and Technology Research program, sponsored by the U.S. Department of Energy. His primary research area is human factors in lighting. He conducts experiments to help refine metrics and specification guidance, with the ultimate goals of advancing lighting quality to improve building occupants’ satisfaction and increasing the use of energy efficient lighting technologies. Prior to joining PNNL, Michael earned a Ph.D. in Architectural Engineering from Penn State University, receiving the 2013 Taylor Technical Talent Award from the IES for his published work. He has authored over 60 peer-reviewed journal articles and government reports.

Members (Voting)

  • Sam M. Berman
  • Steve A. Fotios
  • John D. Bullough
  • Roger Lane
  • James B. Sheehy
  • Ute C. Besenecker
  • Rajaram Bhagavathula

Advisory Members (Non-Voting)

  • C. Cameron Miller
  • Manuel Spitschan
  • Naomi J. Miller
  • Lia Irvin
  • Malgorzata Perz

Advisory Panel Liaisons

  • Ian Ashdown
  • Doug Steel

Board Liaisons


Staff Liaisons

  • Patricia A. McGillicuddy
  • Brian Liebel
  • Geomara Flores
  • Zoe Milgram
  • Dawn De Grazio