資料來源 : pyDict

屈光度

資料來源 : Webster's Revised Unabridged Dictionary (1913)

Dioptre \Di*op"tre\, n. [F. See 2d {Dioptric}.] (Optics)
   A unit employed by oculists in numbering glasses according to
   the metric system; a refractive power equal to that of a
   glass whose principal focal distance is one meter.