Physiological optics at the national bureau of standards

Published work in physiological optics at the National Bureau of Standards is summarized under the headings: evaluation of light-dark patterns, light measurements, color measurement, color differences, and color perception. The bearing of this work on standard methods of the American Society of Testing and Materials, of the Illuminating Engineering Society, and of the American Standards Association, and on recommendations of the International Commission on Illumination is indicated. The purposes and methods of current work are briefly described.