Diopter vs. Dioptric — What's the Difference?

A unit of measurement of the refractive power of lenses equal to the reciprocal of the focal length measured in meters.

Of or relating to dioptrics.

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.

Relating to optical refraction; refractive.

The dioptre adjustment mechanism of a pair of binoculars or of a camera viewfinder.

Acting as a medium for sight; making use of refraction (of lenses, etc.).

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".

(obsolete) Pertaining to a diopter.

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

(obsolete) Capable of being seen through.

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

(in the plural) The branch of optics concerned with refraction.

(obsolete) An alidade.

A dioptric telescope.

(obsolete) A surgical speculum.

Of or pertaining to the dioptre, or to the metric system of numbering glasses.

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

Of or pertaining to dioptrics; assisting vision by means of the refraction of light; refractive; as, the dioptric system; a dioptric glass or telescope.

An optical instrument, invented by Hipparchus, for taking altitudes, leveling, etc.

A unit of measurement of the refractive power of a lens which is equal to the reciprocal of the focal length measured in meters