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Eye laterality: a comprehensive analysis in refractive surgery candidates.

Stephan J Linke1, Vasyl Druchkiv, Johannes Steinberg

  • 1Department of Ophthalmology, University Medical Center Hamburg-Eppendorf (UKE), Hamburg, Germany. slinke@uke.uni-hamburg.de

Acta Ophthalmologica
|February 8, 2013
PubMed
Summary

This study on refractive surgery candidates found no significant difference in overall refractive error between eyes. However, anisometropia greater than 2.5 D showed a higher rate of right eye laterality, particularly in myopic and hyperopic individuals.

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Area of Science:

  • Ophthalmology
  • Refractive Surgery
  • Ocular Biometry

Background:

  • Eye laterality, or a difference in refractive error between eyes, is a common phenomenon.
  • Understanding laterality is crucial for refractive surgery planning and research.
  • Previous studies have explored interocular correlations in refractive error.

Purpose of the Study:

  • To investigate eye laterality in refractive surgery candidates.
  • To determine the association between laterality and refractive state, anisometropia, age, and sex.
  • To assess the implications of laterality for research methodologies.

Main Methods:

  • Analysis of medical records from 12,493 refractive surgery candidates.
  • Measurement of subjective and cycloplegic refractive error for each eye.
Keywords:
anisometropiaastigmatismeye lateralityrefractive statespherical equivalent

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  • Exclusion of amblyopia by ensuring corrected distance visual acuity (CDVA) >20/22.
  • Statistical analysis including t-tests, chi-squared tests, Spearman's correlation, and logistic regression.

    • Main Results:

    • No significant difference in spherical equivalent between right and left eyes overall.
    • A statistically significant higher rate of right eye laterality for anisometropia >2.5 D in both myopic and hyperopic subjects.
    • A tendency for left eye cylindrical laterality in myopic individuals.
    • Myopic males showed a higher prevalence of left eye laterality; age had no significant impact.

    Conclusions:

    • Strong interocular refractive correlation is confirmed across the refractive spectrum.
    • A significant tendency for right eye laterality exists for substantial anisometropia (>2.5 D).
    • Findings support the potential to use data from a single eye in ocular refraction studies, with caveats for significant anisometropia.