New method of quantifying corneal topographic astigmatism that corresponds with manifest refractive cylinder

@article{Alpins2012NewMO,
  title={New method of quantifying corneal topographic astigmatism that corresponds with manifest refractive cylinder},
  author={Noel Alpins and James K. Y. Ong and George Stamatelatos},
  journal={Journal of Cataract and Refractive Surgery},
  year={2012},
  volume={38},
  pages={1978–1988}
}
View on Wolters Kluwer
assort.com
38 Citations
Background Citations
12
Methods Citations
8
Results Citations
1

Figures and Tables from this paper

38 Citations

Corneal topographic astigmatism (CorT) to quantify total corneal astigmatism.
TLDR
Thecorneal topographic astigmatism based on total corneal power measurements corresponds better, both in variability and closeness, with manifest refractive cylinder than the CorT based on anterior corneAL power measurements.
Corneal Topographic Astigmatism Based on Total Corneal Power Data (CorT Total): A Benchmark for Total Corneal Astigmatism.
TLDR
The CorT Total is a reliable benchmark measure that can be used to assess how well other measures of total corneal astigmatism correspond with the manifest refractive cylinder.
Vector Planning and Corneal Topographic Astigmatism
The concept of planning refractive laser treatments using parameters other than manifest or wavefront refraction was somewhat of a novelty until topography-guided treatments came to the forefront…
Anterior, Posterior, and Non-Keratometric Contributions to Refractive Astigmatism in Pseudophakes.
TLDR
ORA was non-zero and not entirely explained by the cornea, especially in those with WTR ACA and with-the-rule ACA, and non-corneal contributions were significant,especially in eyes with W TR ACA.
Surgically Induced Astigmatism Assessment
TLDR
This finding of equivalence in measurements of surgically induced astigmatism (SIA) is most useful given that the parameter known as CorT was demonstrated to be a more accurate measure of cornealAstigmatism using simulated keratometry from the Atlas topographer as used in this study.
LASIK for Spherical Refractive Myopia: Effect of Topographic Astigmatism (Ocular Residual Astigmatism, ORA) on Refractive Outcome
TLDR
A preoperative cornealAstigmatism of ≥0.9 D could (partially) be taken into account in the LASIK design, even if the subjective refractive astigmatism is neutral.
Correlation of major components of ocular astigmatism in myopic patients.
Hemidivisional vector planning to reduce and regularize irregular astigmatism by laser treatment
To demonstrate how hemidivisional vector planning of refractive laser treatments of astigmatism can be used to directly address idiopathic corneal irregular astigmatism that has an asymmetrical,…
Assessing Total Keratometry Astigmatism, Simulated Keratometry, and Total Corneal Topographic Astigmatism Against Manifest Refractive Cylinder.
TLDR
Total Keratometry astigmatism correlates as well with manifest refractive cylinder as simulated keratometryAstigmatism from the same device and CorT Total from a Scheimpflug tomographer support the use of Total Keratometers over simulated ker atometry in the planning of astigmatist surgery when corneal values are required.
Corneal and Ocular Residual Astigmatism in School-Age Children
TLDR
The results of the present study showed a high prevalence and amount of residual astigmatism with ATR pattern among the 6–18-year-old population and the compensatory effect of this type ofAstigmatism on CA that mostly followed a WTR pattern.
...
...

References

SHOWING 1-10 OF 26 REFERENCES
New method of targeting vectors to treat astigmatism
  • N. Alpins
  • Medicine, Physics
    Journal of cataract and refractive surgery
  • 1997
Quantitative descriptors of corneal topography. A clinical study.
TLDR
Quantitative descriptors of corneal topography determined by computerized algorithm and designed to augment the information derived from topographic maps were evaluated in a clinical study and suggest thatCorneal symmetry is a lesser but still important determinant of the optical performance of the anterior cornean surface.
Management of irregular astigmatism.
TLDR
The way to further refinement of the commonly performed refractive techniques will ultimately lie in the integrated inclusion of a trio of technologies: topographic analysis of the corneal surface, wavefront analysis of ocular refractive aberrations, and vector planning to enable the appropriate balance in emphasis between these two diagnostic modalities.
Determination of corneal image-forming properties from corneal topography.
Corneal power measurements using scheimpflug imaging in eyes with prior corneal refractive surgery.
TLDR
When historical refractive data are not available, Scheimpflug imaging with the Pentacam provides an alternative method of measuring the central corneal power in eyes that previously received corneAL refractive surgery.
Influence of internal optical astigmatism on the correction of myopic astigmatism by LASIK.
TLDR
The higher indices of success in the high ORA and high LA groups suggest a lower efficacy of LASIK in treating astigmatism primarily located intraocularly, and topography and refractive value should be incorporated in the treatment of patients when a significant amount of internal opticalAstigmatism is detected preoperatively.
Efficacy of laser in situ keratomileusis in correcting anterior and non‐anterior corneal astigmatism: Comparative study
Astigmatism analysis by the Alpins method
  • N. Alpins
  • Medicine, Physics
    Journal of cataract and refractive surgery
  • 2001
Variation in surgically induced astigmatism estimation due to test-to-test variations in keratometry.
Clinical outcomes of laser in situ keratomileusis using combined topography and refractive wavefront treatments for myopic astigmatism
...
...