dioptre


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dioptre

(daɪˈɒptə) or

diopter

n
(Units) a unit for measuring the refractive power of a lens: the reciprocal of the focal length of the lens expressed in metres
[C16: from Latin dioptra optical instrument, from Greek, from dia- through + opsesthai to see]
diˈoptral adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.dioptre - 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
unit, unit of measurement - any division of quantity accepted as a standard of measurement or exchange; "the dollar is the United States unit of currency"; "a unit of wheat is a bushel"; "change per unit volume"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations

dioptre

, (US) diopter
nDioptrie f
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007

di·op·ter

, dioptre
n. dioptría, unidad de medida de refracción de un lente.
English-Spanish Medical Dictionary © Farlex 2012
References in periodicals archive ?
This suggests that a UK university graduate with 17 years in education would, on average, be one dioptre more myopic than an individual who left school at 16 with 12 years of education.
To put this into context, a university graduate from the UK with 17 years of education would, on average, be at least 1 dioptre more myopic than someone who left school at 16 (with 12 years of education).
university graduate with 17 years of education would be at least −1 dioptre more myopic, on average, than someone who left school at age 16 with 12 years of education.
A rubber-coated body and eyecups, centre focusing wheel, dioptre adjustment, carry case, straps and cleaning cloth complete the finishing touches to a truly quality piece of equipment.
The reciprocal is 2.32 dioptres. Rounding it to the nearest 0.25, would suggest a 2.25 dioptre correction.
Findings suggest that a UK university graduate with 17 years in education would, on average, be one dioptre more myopic than someone who left school at 16 with 12 years of education, researchers explained.
The system takes about 30 seconds to analyse all parameters needed for the use of lenses featuring i.Scription technology, with accuracy to the nearest 1/100 dioptre.
Dr Monica Jong, science and business development manager at the Brien Holden Institute, explained: "The results of this research means that, if an eye care practitioner sees a child with myopia that is progressing by more than one dioptre per year, it gives us the opportunity to do something about it."