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diopter

n. 屈光度

屈光度

WordNet (r) 3.0 (2006) (WordNet)

diopter
n 1: 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 [synonym: {diopter},
{dioptre}]

The Collaborative International Dictionary of English v.0.48 (gcide)

Diopter \Di*op"ter\, Dioptra \Di*op"tra\, n. [L. dioptra, fr.
Gr. ?. See 2d {Dioptric}.]
An optical instrument, invented by Hipparchus, for taking
altitudes, leveling, etc.
[1913 Webster]

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英文字典中文字典相关资料:

Dioptre - Wikipedia
A dioptre (British spelling) or diopter (American spelling), symbol dpt or D, is a unit of measurement with dimension of reciprocal length, equivalent to one reciprocal metre, 1 dpt = 1 m−1
What Is A Diopter? - All About Vision
A diopter is a unit that is used to calculate the focusing strength of a pair of glasses or contact lenses It is the unit used for an optical prescription
What Is a Diopter and How Does It Measure Vision?
The diopter is the standard unit of measurement used to quantify the optical power of a lens or curved mirror, which measures its ability to bend or refract light rays
Understanding Diopters: A Guide to Optical Measurement and . . . - eyeweb
The basic unit of measurement in optometry, diopters, is used to express the optical power of prescription lenses They are made expressly to gauge the way a lens bends or refracts light to properly focus it onto the retina
Magnification vs. Diopter: Understanding the Difference
We’ve said magnification measures the change of an object’s size whenever it’s being viewed through an optical device, while the diopter measures the lens’s strength to bend light
What Is a Diopter? - Warby Parker
A diopter is a unit of measurement for a lens’s focusing power Learn more about what a diopter measures and how diopters vary by prescription
Optical Diopter Strength Explained – Focusers
Diopter strength refers to the optical power of a lens It's commonly applied to reader-strength eyeglasses or bifocals, as well as telescopes other magnifying lenses
Magnification vs Diopter: Complete Guide 2026
Diopter measures the optical power (or strength) of a lens based on its focal length It’s the standard unit used in optometry and optics to describe how much a lens bends light
What is a Diopter? | Visionworks
A diopter is a critical unit of measurement in optics that quantifies the refractive power of lenses used in eyeglasses and contact lenses It indicates the degree to which a lens must bend light to properly focus it onto the retina, correcting visual impairments
Unit diopter - Filtral
The diopter is a unit of measurement that indicates how much a lens refracts light so that objects are mapped exactly on the retina Only then we can truly see really sharp Therefore, a diopter in addition to the power at the same time indicates the strength of our vision

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