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diopter    
n. 屈光度

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  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • What Is a Diopter in Vision and Optics? - zeelool. com
    If you wear contact lenses or glasses, it is important to understand what a diopter is and what it means in a prescription In short, a diopter measures lens power, impacts vision correction and optics, and helps people make informed choices
  • 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
  • What Is a Diopter (D)? Definition, Measuring Lens Power, Vision . . .
    A diopter (D) measures the optical power of a lens and determines how much it bends light to correct vision Learn how it works, how it's measured, and its role in prescriptions for glasses and contact lenses
  • The diopter - PMC
    Therefore, it took two millennia, before Monoyer with Nagel’s help changed the meaning of the word diopter from a see-through device to its most common current meaning: the unit of the refractive power of a lens or a curved mirror





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