refractive error

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refractive error

Ametropia, myopic shift Ophthalmology The inability of images to focus properly on the retina, often corrected by glasses contact lenses, or refractive surgery. See Astigmatism, Farsightedness, Myopia, Presbyopia.

refractive error 

The dioptric power (K) of the ametropia of the eye. It is equal to 1/k in dioptres, where k is the distance between the far point and either the spectacle plane (spectacle refraction), or the principal point of the eye, or the refracting surface of the reduced eye (ocular refraction), in metres. Thus
K = 1/k
when the eye is situated in air. Syn. ametropia (although this is not strictly so as ametropia is the anomaly); refraction of the eye; refractive status; static refraction. See far point of accommodation; Scheiner's experiment.
References in periodicals archive ?
And it can directly calculate the radio wave refraction error of the propagation path by measuring the atmospheric radiation brightness temperature of the propagation path.
The refraction error is manifested directly in the height error of individual benchmarks;
In the levelling loops that involve symmetrical slopes, the refraction error will not be expressed as an error in levelling loop closure.
The differences of refraction error and PAD in the unpolished group were significant between the three-month and six-month visits (p = 0.011 and 0.003, respectively).
This hydrophobic, spherical, one-piece IOL demonstrated relatively little axial shift as well as a small refraction error and minimal BCVA changes during the follow-up period.
Finally, no significant discrepancy in the postoperative visual acuity and refraction error was detected between the polishing and control groups.
[ClickPress, Wed Apr 16 2014] Contact lenses continued its penetration in Indonesian market despite use by a small share of population with vision refraction errors compared to spectacles' penetration.
But all children born prematurely should be examined for refraction errors.
The first GPS-based measurements, which avoid the refraction errors that plague theodolite-based surveys, were taken by Italian geodesists in 1989.
Unrecognized significant refraction errors were found in 34% of subjects.
After correction of the refraction errors, near and distance deviation angles were measured with an accomodation target by either prism cover test or Krimsky test according to patient compliance and were recorded as PD.
Relationship between high-order aberrations and age and between high-order aberrations and refraction errors. Arq Bras Oftalmol.