Abstract
In the present days, information society has so rapidly extended that not only young people but also the elderly have to use the Internet to exchange and acquire information. One of the most popular internet services is WWW that is typical visual media. Human visual characteristics, however, change due to age-related clouding of the eye lens. Therefore, it is very likely that aged people overlook important information of web sites when the change of human visibility is ignored. In this report, the silent reading time, the gaze duration and the saccade were measured using point-of-regard measurement for evaluating legibility of the Web site. As the results, the silent reading time and the gaze duration were extended and the saccade was shortened, when the contrast between characters and a background decreased. Moreover, when the contrast decreased, a decreasing ratio of legibility in a negative coloration compared with a positive coloration was increased. Therefore, it was shown that the legibility is high when the contrast between characters and background is high, and a positive coloration is effective.
