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Binocular Dynamic Visual Acuity in Eyeglass-Corrected Myopic Patients
07:06

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Published on: March 29, 2022

Peripheral refraction in different ethnicities.

Pauline Kang1, Paul Gifford, Philomena McNamara

  • 1School of Optometry and Vision Science, University of New South Wales, Sydney, Australia.

Investigative Ophthalmology & Visual Science
|May 28, 2010
PubMed
Summary

East Asian moderate myopes exhibit more relative peripheral hyperopia than white individuals, suggesting ocular shape differences may influence myopia prevalence. This impacts understanding refractive error development.

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Area of Science:

  • Ophthalmology
  • Optometry
  • Human Genetics

Background:

  • Peripheral refraction is a key indicator of retinal shape.
  • Myopia prevalence differs significantly between white and East Asian populations.

Purpose of the Study:

  • To compare peripheral refraction along the horizontal meridian in white and East Asian young adults.
  • To investigate refractive errors including emmetropic, low myopic, and moderately myopic states.

Main Methods:

  • Recruited 35 white and 37 East Asian subjects with specific refractive error ranges.
  • Measured central and peripheral noncycloplegic autorefraction at 5° intervals up to ±35° horizontally.
  • Quantified corneal topography maps for ocular shape analysis.

Main Results:

  • No significant peripheral refraction differences were found between ethnic groups in emmetropes and low myopes.
  • Moderate myopes showed significant differences: East Asians had more relative peripheral hyperopia than whites.
  • Corneal shape and power were comparable across all refractive groups and ethnicities.

Conclusions:

  • East Asian moderate myopes possess a more prolate ocular shape with greater relative peripheral hyperopia compared to white individuals.
  • These ocular shape variations may contribute to the higher incidence and progression of myopia in East Asians versus whites.