Study on indoor light environment and appearance

Abstract

In Japan, the proportion of diseases leading to visual disorders such as cataract increases with age, and about 73% of people with visual impairment are over 60 years old. While it is predicted that an aging society will proceed, it is expected that people needing low vision care will increase in the future. In the presence of education, medical care, social support and various forms of low vision care, the purpose of this research is to obtain knowledge to support people with low vision from the perspective of design taking advantage of the idea of ergonomics. In this study, we conducted two types of experiments to investigate the relationship between the appearance of objects and the light environment. First, we examined how the change in light affects visibility. As a result, it was suggested that and influenced visibility. Furthermore, in the irradiation situation with low visibility, the difference in the color of the wall was observed, so it turned out that the factor of reflectance also influences the visibility in the difference of appearance by the boundary line. Next, we conducted a waling experiment to investigate how people actually act in movement. In this study, the following was shown. The confirmation of boundaries such as “wall and floor” and “wall and wall” becomes important clue for space recognition when low vision person walks indoors. The visibility of the edge is also related to the illuminance of the space.