以米为单位测得镜片的近轴顶焦距的倒数。一个镜片含有两个顶焦度,在配装眼镜中特指后顶焦度,即以米为单位测得的镜片近轴后顶焦距的倒数。
... 数字显示式焦度计 digitally rounding focimeter 顶焦度 vertex power 后顶焦度 back vertex power ...
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... vertex lens power 顶焦度 vertex dioptric power 镜顶屈光度 back vertex power 后顶点屈光度 ; 后顶焦度 ...
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提出一种数字投影式顶焦度测量的技术方案。
A technical scheme for the digital projection type vertometer is proposed.
目的:证实采用接触镜专用标准透镜组标定的焦度计不能准确测定被测角膜接触镜的顶焦度。
Objective:To confirm that the lensometer adjusted by the special lenses group for contact lenses can't express the back vertex power of contact lenses.
本文叙述了焦度计的误差,顶焦度标准镜片内表面弯度的选择原则,以及标准镜片的测量方法等。
This paper describes the error in focimeters, the principle of selection on curvature of inside face for vertex power of standard lenses and the method for measuring them.
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