n. 屈光度, 折光度

[计] 屈折度, 屈光度

[化] 屈光度; 折光度

[医] 屈光度

[ 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
<noun.quantity>

Diopter \Di*op"ter\, ||Dioptra \Di*op"tra\, n. [L. dioptra, fr.
Gr. ?. See 2d {Dioptric}.]
An optical instrument, invented by Hipparchus, for taking
altitudes, leveling, etc.
※ ||