The effect of color difference on the functional visual field

Abstract

Previous research has revealed that the functional visual field is affected by the difference in color between the target and the background, however, few studies have been conducted on this relationship. The aim of this study is to clarify these effects. An experiment in which a subject distinguished a target from background noise was conducted. The color patterns used were red, green and blue. The target and the noise were the same color, i.e., of the same dominant wavelength, but differed in purity. The results show that the functional visual field increases as color difference increases, and then it reaches an upper limit in the normal functional visual field. The results also show that the recognition of an object is easy when the color difference is more than 80 in the CIE 1976 L*u*v* color space.