Analysis of reading behavior of low vision with close reading distance

本研究的目的是调查低视力儿童的阅读行为特点，并从使用电子教材的角度对其结果进行讨论。考察了PC显示器的恒定对比度而不考虑读取距离对打印大小的偏好的效果，并比较了使用印刷品和平板PC时的读取距离以及头、眼和手的运动。结果，平板电脑上的低视力阅读行为与印刷品上的阅读行为没有区别。这意味着阅读电子教科书将与阅读传统教科书没有什么不同。此外，还考虑了电子教材的两个优点。一种是，由于平板电脑显示器的对比度不变，较小的打印尺寸将是可以接受的。另一个原因是，改变平板电脑显示器的对比度很容易。

The purpose of this study was to investigate the characteristics of reading behavior of low visions and to discuss the results from the standpoint of using electronic textbook for low vision. The effect of a constant contrast of a PC display regardless of reading distance for preference of print size was examined and reading distance and movements of head, eye and hand when using printed matter and a tablet PC were compared. As a result, the reading behavior of low visions on the tablet PC was not differed from that on the printed matter. It means that reading electronic textbooks will be not differed from reading conventional textbooks. In addition, two advantages of electronic textbooks were considered. One is smaller print size will be acceptable as contrast of a tablet PC display is constant. Another is that it is very easy to change contrast polarity of a tablet PC display.