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Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter
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Off-axis partial coherence interferometry in myopes and emmetropes.

Asieh Ehsaei1, Catharine M Chisholm, Ian E Pacey

  • 1Bradford School of Optometry and Vision Science, University of Bradford, Bradford, UK. Ehsaei.asieh@gmail.com

Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)
|November 23, 2012
PubMed
Summary
This summary is machine-generated.

Myopic eyes have an ellipsoid shape, unlike the spherical shape of emmetropic eyes. Peripheral eye dimensions differ significantly between these groups, offering insights into myopia development.

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Area of Science:

  • Ophthalmology
  • Optometry
  • Biomedical Optics

Background:

  • Understanding ocular dimensions is crucial for myopia research.
  • Peripheral eye properties may influence refractive error development.
  • Partial coherence interferometry offers precise biometry.

Purpose of the Study:

  • To measure axial and peripheral eye dimensions in myopic and emmetropic individuals.
  • To investigate differences in retinal shape across eccentricities.
  • To explore the relationship between peripheral eye optics and myopia.

Main Methods:

  • Used partial coherence interferometry (Zeiss IOLMaster) for non-contact measurements.
  • Measured axial length and peripheral cornea-to-retina lengths.
  • Assessed eyes at the fovea and up to 30° eccentricity horizontally and vertically.

Main Results:

  • Significant differences in retinal shape profiles between myopic and emmetropic eyes.
  • Myopic eyes showed a faster change in cornea-to-retina length with eccentricity.
  • Pronounced nasal-temporal asymmetry observed, especially in myopic eyes.

Conclusions:

  • Myopic eyes exhibit an ellipsoid shape, contrasting with the spherical shape of emmetropic eyes.
  • Peripheral eye dimensions provide insights into refractive development.
  • Partial coherence interferometry is effective for characterizing ocular shape.