Age-related decline in color perception and difficulties with daily activities-measurement, questionnaire, optical and computer-graphics simulation studies

In aging societies, the age-related decline in visual ability is a particul arly important problem. To identify problems in daily living caused by this decline in visual ability, we simulated vision in the elderly using yellow ed lenses. A questionnaire study was then conducted to investigate the popu lation and age group that has visual deficits about issues identified in th e optical study. Subjective responses related to yellowing in vision became prominent in people over 75 years old. A color judgment experiment was car ried out using subjects aged 80 or older. Confusing color combinations are, yellow/white, blue/green. dark blue/black and purple/dark red. Based on th is color confusion data, we used computer graphics to simulate vision in th e elderly. Simulated views of public signs are shown. Relevance to industry This study shows what colors tend to be confused by the elderly and provide s essential data for developing products for older adults. Color combinatio ns on interfaces such as switches, indicators and displays have to be consi dered carefully. Optical and computer-graphics simulations of the yellowed vision of the elderly based on color tests are powerful tools for improveme nt through experience. (C) 2001 Elsevier Science B.V. All rights reserved.