关于CWB90-Ⅰ型阅读距离控制仪的设计

Design of CMB90-Ⅰ Type Instrument for Controlling reading distance

身高不同读距应各异。为控制各异读距，笔者设计了阅读距离控制仪。通过302名儿童少年验证及读距和读控读距统计学处理，t为1．54，P＞0．05两者无差异。使用读控仪杜绝了近距离作业和不自觉的弯腰驼背，故可以预防近视和脊柱弯曲畸形。

At present, no breakthrough progress has been gained in treatment of myopia. First thing is to help children as early as possible. Reading distance varies according to diffierent body height. In order to prevent myopia and control various reading distance,the instrument of CWB90-I type for controlling reading distance has been designed by the regression equation y = 0. 262x- 0. 77. It can make children sit up straight and keep a physiologycal reading distance. Surveied by 302 children and early youth' test and verify, reading distance and the reading distance controlled by the instrument regression coefficient 'b 'notable test,t = 1. 54 P> 0. 05, there's no striking diserepaney between them. lt showed that the design of the instrument for contro1ling reading distance based on science. Reading and writing with it can stop one way to myopia:bend over to close reading and writ ing unconsciously. This has a beneficial action in preventing myopia and spinal co1umn lopsided development.