Practical color barrier‐free illumination for deuteranopia using LEDs

Here, we propose a color barrier-free illumination consisting of white, red, and blue LEDs for people with deuteranopia-type defects in color perception. Color perceptions of 20 volunteers with normal vision and four examinees of deuteranopia were evaluated by both the Ishihara test for color blindness and the Farnsworth Panel D-15 test under color barrier-free illumination. The illumination was comparably effective, not only for discriminating between red and green but also for discrimination of the hues on a color chip continuously. © 2014 Wiley Periodicals, Inc. Col Res Appl, 40, 218–223, 2015