Dioptre - Definition
dioptre
n 1: 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 [syn: diopter,
dioptre]
n 1: 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 [syn: diopter,
dioptre]