VISION OF THE ELDERLY AND VISUALLY IMPAIRED -FOR ACCESSIBLE DESIGN IN LIGHT AND LIGHTING-

摘要

Accessible design, a concept to address the needs of people with special requirements such as older people and people with disabilities, is introduced for consideration of lighting for the elderly and visually impaired. To implement the concept of accessible design in light and lighting field fundamental data on human vision of the elderly and visually impaired are necessary to correctly address the needs of them. In this paper, some basic visual functions such as spectral luminous efficiency function, span of categorical colours, visual acuity, and useful field of view, are shown as a function of age together with its implication to designing visual signs and lighting. Data on low vision are also presented with regards to contrast sensitivity function and span of categorical colours.