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diopters (0 synonym found)
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Definition of diopters:
(n) :
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.
(n) :
The dioptre adjustment mechanism of a pair of binoculars or of a camera viewfinder.
(n) :
(photography, dated) A lens element attached to the front of a photographic lens to shorten the lens's minimum focus distance; also called a "close-up filter".
(n) :
(obsolete) Any lens system, such as a telescope.
(n) :
(obsolete) A theodolite or similar surveyor’s angle measuring device.
(n) :
(obsolete) An alidade.
Definition of diopters:
(n) :
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.
(n) :
The dioptre adjustment mechanism of a pair of binoculars or of a camera viewfinder.
(n) :
(photography, dated) A lens element attached to the front of a photographic lens to shorten the lens's minimum focus distance; also called a "close-up filter".
(n) :
(obsolete) Any lens system, such as a telescope.
(n) :
(obsolete) A theodolite or similar surveyor’s angle measuring device.
(n) :
(obsolete) An alidade.
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