diopter


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diopter

 [di-op´ter]
a unit of refractive power of lenses: the reciprocal of the focal length in meters is the refractive power in diopters. Symbol D.

di·op·ter (D),

(dī-op'tĕr),
The unit of refracting power of lenses, denoting the reciprocal of the focal length expressed in meters.
[G. dioptra, a leveling instrument]

diopter

/di·op·ter/ (di-op´ter) a unit for refractive power of lenses, being the reciprocal of the focal length expressed in meters; symbol D.
prism diopter  a unit of prismatic deviation, being the deflection of 1 cm. at a distance of one meter; symbol Δ.

diopter (D)

[dī·op′tər]
Etymology: Gk, dioptra, optical measuring instrument
a metric measure of the refractive power of a lens. It is equal to the reciprocal of the focal length of the lens in meters. For example, a lens with a focal length of 0.5 m has a diopter measure of 2.0 (1/0.5) and when prescribed as a corrective lens for the eye should make printed matter most clearly focused when it is held 0.5 m from the eyes.

di·op·ter

(D, Δ, δ) (dī-op'tĕr)
The unit of refracting power of lenses, denoting the reciprocal of the focal length expressed in meters.
[G. dioptra, a leveling instrument]

Diopter (D)

Unit describing the amount of focusing power of a lens.

diopter

a unit adopted for calibration of lenses, being the reciprocal of the focal length when expressed in meters; symbol D.
References in periodicals archive ?
The approval of Crystalens HD in quarter diopters is Bausch & Lomb's contribution to the best possible outcomes for our surgeons and patients," said Andy Corley, president of Bausch & Lomb Surgical.
The company is presently conducting clinical trials in the United States for its lens for the correction of hyperopia up to +6 diopters.
While the ICL is normally reserved for people with over 10 diopters of nearsightedness or 4 diopters of farsightedness, patients with less severe prescriptions may be considered for the ICL if their cornea is too thin to be treated with LASIK.
The ALLEGRETTO WAVE, manufactured by WaveLight Laser Technologie, AG, was the first refractive laser to receive concurrent approvals for the treatment of myopia up to -12 diopters with astigmatism of up to -6 diopters and hyperopia up to +6 diopters with astigmatism of up to +5 diopters, not exceeding a mean spherical equivalent of +6 diopters.
5 diopters of myopia before the procedure and was unable to see the largest letter on the standard vision chart," said Dr.
The ALLEGRETTO WAVE is the first refractive laser to receive clearance for both indications with treatment ranges for myopia of up to -12 diopters and with astigmatism of up to -6 diopters.
The panel voted 8-3 to recommend that the STAAR Implantable Contact Lens (ICL) be approved with conditions for use in correcting myopia in the range of -3 diopters to -15 diopters and reducing myopia in the range of -15 diopters to -20 diopters.