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Definition of Dioptre
1. Noun. 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.
Definition of Dioptre
1. n. 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.
Definition of Dioptre
1. diopter [n -S] - See also: diopter
Medical Definition of Dioptre
1.