dioptre

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Dioptre - Wikipedia
A dioptre (British spelling) or diopter (American spelling), symbol dpt or D, is a unit of measurement with dimension of reciprocal length. en.wikipedia.org
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DIOPTRE | definition in the Cambridge English Dictionary
a unit of measurement of the power of a lens, used for measuring a person's eyesight: A typical short-sighted person in Britain is -4.5 dioptres ... dictionary.cambridge.org
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What Is a Diopter? | Warby Parker
A diopter is a unit of measurement that represents the optical strength of a lens. The optical power is the reciprocal, or inverse, of the focal length. www.warbyparker.com
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dioptre
dioptre (daɪˈɒptə(r)) [The usual spelling in Great Britain of diopter in sense 5.] A unit for expressing the power of a lens, equal to the reciprocal of its focal length in metres.[1876 Compte-rendu: Congrès internat. des Sciences médicales 1875 (Brussels) 610 L'unité du système métrique, c'est le m... Oxford English Dictionary
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Dioptre - MyHealth Alberta
The dioptre is a unit of measurement used to describe how well a person sees. Farsightedness is measured in positive dioptres, and nearsightedness is measured ... myhealth.alberta.ca
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Optical diopters: Lens strength, meaning and more - All About Vision
A diopter is a unit used to calculate the focusing strength of a pair of glasses or contact lenses. And it is the measurement unit for an optical prescription. www.allaboutvision.com
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Diopter (disambiguation) - Wikipedia
In modern usage, diopter or dioptre is a measure of the optical power of an optical system. Diopter may also refer to: Historically, a dioptric lens; Any ... en.wikipedia.org
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Dioptre and Magnification explained - The Daylight Company
Dioptre refers to the curvature of the lens. As the dioptre increases, the lens become thicker and the curvature greater. As the curvature ... daylightcompany.com
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dioptre - Metric System
The dioptre, symbol D, is a non-SI unit of measurement of the optical power of a lens or curved mirror. The dioptre is not accepted for use with the SI. One ... metricsystem.net
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Dioptre - Definition, Meaning & Synonyms - Vocabulary.com
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. www.vocabulary.com
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Define 1 dioptre of power of a lens. - CK-12
1 dioptre (D) is the unit of measurement for the optical power of a lens. It is defined as the inverse of the focal length (f) of the lens, measured in meters. www.ck12.org
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Diopter (disambiguation)
In modern usage, diopter or dioptre is a measure of the refractive power of an optical system. wikipedia.org
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diopter
diopter (daɪˈɒptə(r)) Also in Lat. form dioptra. [a. F. dioptre (1547 in Hatz.-Darm.), ad. L. dioptra, a. Gr. δίοπτρα an optical instrument for measuring heights, levelling, etc.; cf. also Gr. δίοπτρον spying-glass, f. δι-, δια- through + stem ὀπ- to see + instrumental suffix, -τρα, -τρον.] 1. An an... Oxford English Dictionary
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Dioptrics
See also Diopter/Dioptre (unit of measurement) Dioptrice (work by Johannes Kepler) Catoptrics (study of and optical systems utilizing reflection) Catadioptrics wikipedia.org
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Dioptra
A dioptra (sometimes also named dioptre or diopter, from ) is a classical astronomical and surveying instrument, dating from the 3rd century BC. wikipedia.org
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