更多信息:http://www.yankodesign.com/2014/07/28/the-right-distance/看书、写字距离眼睛太近一直是近视和驼背的罪魁祸首。如何能够适时调整坐姿是家长和学生头痛的问题。目前这个问题有望被一个独特设计的书夹来解决。当你的眼睛和书本的距离小于最佳阅读距离30厘米的时候,就会在书本上看到一个戴着眼睛的愤怒红色小脸,提醒你调整距离。红色小脸及其警告文字是书夹投射在书本上的。 More information: http://www.yankodesign.com/2014/07/28/the-right-distance/ Reading too close to the eyes and writing has been the culprit in myopia and humpbacks. How to adjust the sitting position in time is a headache for parents and students. The current problem is expected to be solved by a uniquely designed book. When the distance between your eyes and the book is less than 30 centimeters of the best reading distance, you will see in your book an angry red face with eyes to remind you to adjust the distance. The little red face and its warning text are book covers projected onto the book.