2022年10月30日 · 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. If you know the power of a lens in diopters, taking the inverse will give you the focal length — the distance where light is focused. What does a diopter mean?

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.

2024年4月4日 · 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.

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.

Your units of measure are likely "diopters." If someone needs glasses for reading (because the person is far sighted), then they would be given an prescription with a + [digit], and note that each eye could be different (and usually is, at least slightly).

2024年9月10日 · 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.

2024年4月22日 · The diopter calculator efficiently determines the optical power of a lens in diopters using its focal length.

2024年3月13日 · Converting Magnification to Diopters So, we’ve already explained how different these two measurements are. 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.

2025年2月10日 · Diopters are your key to understanding your prescription and making informed decisions about your eyewear. A diopter is a unit that measures the refractive power of a lens or an optical system, describing how effectively it bends light to focus an image on the retina.

The meaning of DIOPTER is a unit of measurement of the refractive power of lenses equal to the reciprocal of the focal length in meters.