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刘西华同志所提出眼镜技术方面的三个问题,也是眼镜行业普遍存在的问题,现在《中国眼镜科技杂志》上作逐一解答。 一、为什么眼镜片的光学中心要在水平瞳距线上下移12度。怎样移?12度是多少量值? 装眼镜首先要在镜框内作几何定位。这个定位含有戴镜者水平瞳距和下移12度,下移12度是日本科学家的论证,也是经我国眼镜专家实践证明而得出的科学定义的数据。我们也可以作一个实验:立正距墙壁300cm站好,视线平行向前方(远洋法射出)看墙上一点作一记
Comrade Liu Xihua glasses technology proposed by the three issues, but also the glasses industry is a common problem, and now “China Optical Technology Magazine,” one by one answer. First, why the ophthalmic lens optical center in the horizontal pupil distance down 12 degrees. How to move? 12 degrees is the amount of value? First of all wear glasses to make geometric positioning within the frame. This positioning contains wearing glasses horizontal interpupillary distance and 12 degrees down, 12 degrees down the argument is a Japanese scientist, but also by our glasses experts proved that the scientific derived data. We can also make an experiment: standing 300cm away from the wall stand well, parallel to the front line of sight (ocean method shot) look at the wall for a note