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
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用作名詞(n.)
A digital diopter measuring instrument is described for lens spherical vertex power and cylindrical axis measurement. 本文論述了一種采用旋轉編碼器與莫爾條紋測長相結合進行眼鏡片的頂點屈光度。
With age increasing,the diopter of these subjects had a tendency of hypermetropia from myopia. 隨著年齡的增長，人眼的屈光度有由近視向遠視變化的趨勢。