Abstract

Color vision at an intermediate luminance or illuminance level between photopic and scotopic range is called mesopic vision. The color of objects in mesopic vision is differently perceived from that in photopic vision, because not only cones but also rods contribute to the visual response. In general, red becomes dimmer than blue with decreasing illuminance level, which is known as the Purkinje phenomenon. Although many studies concerning the brightness in mesopic vision have been reported, there are very few experimental data dealing with color appearance at the mesopic level.

© 1992 Optical Society of America