Abstract
Cataract (white cloudy condition) resulting from the turbidity in crystalline lens of the eye, changes in the transmission factor of light resulting from yellow discoloration of the crystalline lens. In this study, by the use of LEDs in red, yellow, green and blue, visual experiment on aged and young peoples has been conducted to make comparison between them. In addition, we have conducted visual experiment using materials to simulate eyesight of elderly. Based on results of these visual experiments, it would be possible to create a better living environment for aged people. In this paper we would like to create a new guideline as a way to evaluate the visual characteristics relative to respective LEDs in red, yellow, green and blue.
