Associations to the word «Diopter»

DIOPTER, noun. A unit of measure of the power of a lens or mirror, equal to the reciprocal of its focal length in meters. Myopia is diagnosed and measured in diopters.

DIOPTER, noun. (obsolete) Any lens system, such as a telescope.

DIOPTER, noun. (obsolete) A theodolite or similar surveyor’s angle measuring device.

DIOPTER, noun. (obsolete) An alidade.

DIOPTER, noun. (obsolete) A surgical speculum.

DIOPTER, noun. (obsolete) An instrument for drawing the skull by projections.

DIOPTER, 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.