Diopter

Diopter

Unit of lens refractive power, equal to the reciprocal of the lens focus length in meters.

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Part of Speech: noun
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Industry/Domain: Eyewear
Category: Glasses
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diopter

Health care; Optometry

Unit of measure for the refractive (light-bending) power of a lens; eye care practitioners use it in eyeglass and contact lens prescriptions. A negative number refers to ...

diopter

Photography; Professional photography

unit used to express the power of a lens. It is the reciprocal of the focal length expressed in meters.

diopter

Earth science; Mapping science

A unit of measurement for the magnifying power of a lens, equal to the reciprocal of the focal length in meters. dioptric (adj. ) Containing only refractive elements (lenses ...

diopter

Science; General science

A measure of the power of a lens or a prism. The diopter (also called dioptrie) is usually abbreviated D. Its dimension is a reciprocal length, and its unit is the reciprocal of ...

diopter

Eyewear; Glasses

Unit of lens refractive power, equal to the reciprocal of the lens focus length in meters.

diopter

Eyewear; Optometry; Contact lenses; Eye surgery

A unit of measure of the refractive power if a lens. A one-diopter lens will focus parallel light rays one meter from the lens and a two-diopter lens will focus one-half of a ...

Project Glass

Eyewear; Glasses

Project Glass is a research and development program by Google to prototype and build an augmented reality head-mounted display (HMD). While the idea is not new, the project has ...

adjustable glasses

Eyewear; Glasses

Recently in the news for the consumer market, adjustable glasses have also been featured as a method of alleviating difficulties and increasing productivity for people in ...

harry potter glasses

Eyewear; Glasses

A thick, round glasses seen in the eponymous character in J.K. Rowling's Harry Potter series.

pupillary distance (PD)

Eyewear; Glasses

The distance (measured in mm) between the center of your pupils of your eyes when looking far away in the distance. If the prescription lenses are not set at the same distance as ...

round-seg bifocal

Eyewear; Glasses

Uses a round reading section for the bifocal lens that is put on the back of the lens rather than the front, putting the lens closer to the eye for an expanded reading area.

scratch resistant coating

Eyewear; Glasses

A coating that makes lenses less prone to scratching.

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