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Structure versus function in high myopia using optical coherence tomography and automated perimetry.

Nasrin Moghadas Sharif1,2, Nasser Shoeibi3, Asieh Ehsaei1,2

  • 1Refractive Errors Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.

Clinical & Experimental Optometry
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Summary

High myopia is linked to retinal thinning, impacting visual field sensitivity. Further research is needed to understand these structure-function changes in the retina.

Keywords:
high myopiaoptical coherence tomographyretinal thicknessvisual fields

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Area of Science:

  • Ophthalmology
  • Retinal Imaging
  • Visual Field Testing

Background:

  • High myopia is associated with structural changes in the retina.
  • Understanding the relationship between retinal thickness and visual function is crucial for managing myopia-related complications.

Purpose of the Study:

  • To investigate the structure-function relationship between retinal thickness and visual field sensitivity in individuals with high myopia.
  • To correlate spectral-domain optical coherence tomography (SD-OCT) measurements with standard automated perimetry (SAP) results.

Main Methods:

  • Fifty-eight highly myopic individuals (mean spherical equivalent refraction ≤ -6.00 D) were included.
  • SD-OCT (Spectralis) was used to measure macular layer thicknesses in a 6x6mm area.
  • Humphrey Field Analyzer II-i was used for visual field evaluation at 17 central locations.

Main Results:

  • Significant positive correlations were found between retinal layer thicknesses and visual field sensitivities.
  • Specifically, the ganglion cell layer in all quadrants showed correlation.
  • Correlations were also observed in the nerve fiber layer and outer nuclear layer with specific visual field quadrants.

Conclusions:

  • Retinal layer thinning in high myopia may contribute to reduced visual field sensitivity.
  • Lateral retinal stretching due to myopia could explain these observed correlations.
  • Further research is recommended to elucidate the mechanisms behind these structure-function relationships.