Visibility study on Japanese character with voiced sound marks for children with low vision and development of fonts for low vision children

在本研究中，我们在阅读字体的对比实验中发现，弱视儿童的最小可读字体大小比正常人大3个点左右。根据实验结果，我们开发了适合低视力儿童的字体。我们开发的字体的特点是，这些浊音标记大约是普通字体的4倍大。为了评估发达字体对低视力儿童的可用性，我们使用发达字体和正常字体进行了对比实验。在实验中，我们检查了发达字体的可读性，我们发现，与最初的实验结果相比，阅读用发达字体打印的单词的问题百分比有了很大的倾斜。我们认为这清楚地表明，开发字体对低视力儿童是有用的。

In this study, we discovered that minimum readable font size of low vision children is about 3 points larger than that of sighted people in the comparative experiments of reading fonts. We developed fonts for low vision children based on the results of the experiments. The fonts we have developed are formulated in the characteristics of those voiced sound marks being about 4 times as large as normal fonts. In order to assess the availability of developed fonts for low vision children, we conducted the comparative experiment using developed fornts and normal fonts. In the experiments, we checked the readability of developed fonts, and we found that percentage of questions about reading words printed with developed fornts are much inclined in comparison with the results of initial experiment. We suppose this makes it clear that developed fonts are useful for low vision children.