Visual Acuity in Simple Myopic Astigmatism: Influence of Cylinder Axis

@article{Remn2006VisualAI,
  title={Visual Acuity in Simple Myopic Astigmatism: Influence of Cylinder Axis},
  author={Laura Rem{\'o}n and M. Quintanilla Tornel and Walter D. Furlan},
  journal={Optometry and Vision Science},
  year={2006},
  volume={83},
  pages={311-315}
}
PURPOSE The relationship between astigmatic refractive errors and their associated visual acuity has been studied in recent years in the context of refractive power space. [] Key MethodMETHODS Simple myopic astigmatism from 0 to -3.00 D, in steps of -0.25 D, and with five different axes between 0 degrees and 90 degrees , were simulated on four healthy eyes of young observers. In each case, visual acuity was recorded for three different tests.
View on Wolters Kluwer
uv.es
61 Citations
Highly Influential Citations
4
Background Citations
11
Methods Citations
4
Results Citations
10

61 Citations

Citation Type

Citation Type

Influence of different types of astigmatism on visual acuity
Effect of axis orientation on visual performance in astigmatic eyes
Prediction of distance visual acuity in presbyopic astigmatic subjects
TLDR
These regression formulas may be clinically beneficial not only for estimating the visual prognosis after astigmatic correction, but also for determining the surgical indication of astigmatism in a presbyopic population.
Visual acuity with computer simulated and lens-induced astigmatism
The relationship between spherical and astigmatic refractive errors and their associated visual acuity is investigated in this work by means of two different approaches. In the first one, different…
Effect of Under and Over Refractive Correction on Visual Acuity Performance using Two Different Charts
TLDR
The over and under refractive correction affected the visual acuity performance differently and theLandolt C chart and Bailey-Lovie LogMAR chart demonstrated variation in measurements.
The Visual Impact of Lens-Induced Astigmatism is Linked to Habitual Axis.
  • A. Hughes, E. Mallen, D. Elliott
  • Medicine, Physics
    Optometry and vision science : official publication of the American Academy of Optometry
  • 2017
TLDR
The impact of lens-induced astigmatism was dependent on the refractive status of the participants, and it is important to consider the participants' habitual axis ofAstigmatism.
The Effect of Astigmatism Axis on Visual Acuity
TLDR
The astigmatic axis has a small but significant effect on UDVA in emmetropic eyes; WTR was better than oblique and ATR astigmatism; therefore, when correcting astigmatisms, it may be preferable to err towards WTR astigmaticism.
Influence of additional astigmatism on distance-corrected near visual acuity and reading performance
TLDR
WTR astigmatism results in reduced reading parameters and NVA for −0.75”D and −1.5 D astigmatists compared with corresponding ATR astigmatisms and no astigmatist added.
Type of residual astigmatism and uncorrected visual acuity in pseudophakic eyes
TLDR
Investigation of the association between astigmatism type and UDVA in eyes after cataract surgery with consideration for various confounding factors indicates that UDVA is significantly better in eyes with minimum and WTRAstigmatism than in those with ATR and oblique astigmatisms, after adjustment for confounding parameters.
Relation between Uncorrected Astigmatism and Visual Acuity in Pseudophakia
TLDR
The impact of induced astigmatism and pupil size on the distance and near acuity of otherwise emmetropic pseudophakic eyes implanted with monofocal intraocular lenses is determined.
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 18 REFERENCES
Closed Surfaces of Constant Visual Acuity in Symmetric Dioptric Power Space
  • A. Rubin, W. F. Harris
  • Physics
    Optometry and vision science : official publication of the American Academy of Optometry
  • 2001
TLDR
The multivariate and graphical methods used in this paper probably have implications for the direction of future research in a number of areas involving measures of vision function such as autorefraction, retinoscopy, subjective refraction, and visual acuity.
Spherocylindrical Refractive Errors and Visual Acuity
  • T. Raasch
  • Medicine
    Optometry and vision science : official publication of the American Academy of Optometry
  • 1995
TLDR
It is possible to combine spherocylindrical refractive errors into a single value when the objective is to correlate these values with visual acuity performance.
Effect of Defocus on Visual Acuity As Measured by Source and Observer Methods
  • G. Smith, R. Jacobs, C. Chan
  • Physics
    Optometry and vision science : official publication of the American Academy of Optometry
  • 1989
TLDR
Results show that the source method of producing defocus could be used interchangeably with the observer method in investigating the rates of change of visual acuity with defocus for young normal observers.
The Freiburg Visual Acuity test--automatic measurement of visual acuity.
  • M. Bach
  • Biology
    Optometry and vision science : official publication of the American Academy of Optometry
  • 1996
TLDR
Even the shape of small Landolt-Cs with oblique gaps is adequate and visual acuities from 5/80 (0.06) up to 5/1.4 (3.6) can be tested at a distance of 5 m, and anti-aliasing was improved by a factor of four.
Visual Acuity Results in School-Aged Children and Adults: Lea Symbols Chart Versus Bailey-Lovie Chart
TLDR
The Lea Symbols chart provides a measure of inter-eye difference that is similar to that obtained with the Bailey-Lovie chart, however, the monocular acuity results obtain with the Lea symbols chart differ from those obtained with this chart, and the difference is dependent on the individual’s absolute level of visual acuity.
Comparison of letter and Vernier acuities with dioptric and diffusive blur.
TLDR
Both dioptric and diffusive blur introduce common processing limitations for letter and Vernier acuity, as long as the lines comprising the Vernier targets remain equally detectable when various amounts of dioptic and Diffusive blur are imposed.
Effects of Induced Optical Blur on Infant Visal Acuity
TLDR
The results show that 1 to 2 D of induced blur is sufficient to cause a significant decrease in visual acuity in some infants.
Dioptric Power: Its Nature and Its Representation in Three- and Four-Dimensional Space
  • W. F. Harris
  • Physics
    Optometry and vision science : official publication of the American Academy of Optometry
  • 1997
TLDR
The intention in this paper is to provide a definitive statement on the nature, function, and mathematical representation of dioptric power in terms of the matrix and within the limitations of paraxial or linear optics.
Modeling logMAR Visual Acuity Scores: Effects of Termination Rules and Alternative Forced-Choice Options
  • Andrew Carkeet
  • Medicine
    Optometry and vision science : official publication of the American Academy of Optometry
  • 2001
TLDR
The mean and standard deviation of logMAR scores can be significantly affected by termination rules and AFC format, and a number of clinically suitable termination rules are proposed for different AFC format logMAR charts.
Multimeridional Refraction: Dependence of the Measurement Accuracy on the Number of Meridians Refracted
  • U. Oechsner, R. Kusel
  • Physics
    Optometry and vision science : official publication of the American Academy of Optometry
  • 1997
A Monte Carlo simulation of multimeridional refraction measurements was used to investigate the dependence of the accuracy of the measurement on the number of meridians refracted, N, and on the…
...
1
2
...