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Correction of Presbyopia by Monocular Bi-Aspheric Ablation Profile
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Published on: September 20, 2024

Higher-order aberrations in myopic eyes.

Farid Karimian1, Sepehr Feizi, Azade Doozande

  • 1Labbafinejad Medical Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.

Journal of Ophthalmic & Vision Research
|June 28, 2012
PubMed
Summary

This study found that primary horizontal trefoil, spherical aberration, and primary vertical coma are the most common higher-order aberrations in myopic astigmatism. These aberrations correlate with refractive error and increase with age.

Keywords:
Hartmann-Shack AberrometerHigher-Order AberrationsMyopiaZywave Aberrometer

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Area of Science:

  • Ophthalmology
  • Optometry
  • Vision Science

Background:

  • Myopic astigmatism is a common refractive error.
  • Higher-order aberrations (HOAs) can affect visual quality.
  • Understanding the relationship between refractive error and HOAs is crucial for visual correction.

Purpose of the Study:

  • To investigate the correlation between refractive error and higher-order aberrations (HOAs) in patients with myopic astigmatism.
  • To identify the predominant HOAs in this patient population.

Main Methods:

  • Higher-order aberrations were measured using the Zywave II aberrometer.
  • Correlations between HOAs, myopia, astigmatism, and age were analyzed in 126 eyes from 63 subjects.
  • Statistical analysis was performed to determine significant relationships.

Main Results:

  • Primary horizontal trefoil was the most common HOA, followed by spherical aberration and primary vertical coma.
  • Significant correlations were found between refractive error and primary horizontal coma/spherical aberration.
  • Astigmatism correlated with total HOA, fourth-order aberration, and primary horizontal coma.
  • Spherical aberration and secondary vertical coma increased with age.

Conclusions:

  • Primary horizontal trefoil, spherical aberration, and primary vertical coma are the predominant HOAs in myopic astigmatism.
  • These HOAs show significant correlations with refractive error components and age.
  • Findings contribute to understanding visual optics in myopic astigmatism.