a unit of measurement of the refractive power of a lens which is equal to the reciprocal of the focal length measured in meters; used by oculists
例句
用作名词 (n.)
A digital diopter measuring instrument is described for lens spherical vertex power and cylindrical axis measurement. 本文论述了一种采用旋转编码器与莫尔条纹测长相结合进行眼镜片的顶点屈光度。
With age increasing,the diopter of these subjects had a tendency of hypermetropia from myopia. 随着年龄的增长，人眼的屈光度有由近视向远视变化的趋势。
美
[daɪ'ɒptə]
