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Multifocal electroretinogram in myopia

H Kawabata1, E Adachi-Usami

  • 1Department of Ophthalmology, Chiba University School of Medicine, Japan.

Investigative Ophthalmology & Visual Science
|January 7, 1998
PubMed
Summary
This summary is machine-generated.

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Early myopia can cause reduced retinal function, even with normal vision. Multifocal electroretinography (multifocal ERG) shows decreased cone function in myopic eyes.

Area of Science:

  • Ophthalmology
  • Retinal Physiology
  • Myopia Research

Background:

  • Myopia is a common refractive error.
  • Early functional changes in the retina of myopic eyes are not well understood.
  • Tessellated fundus can be present in myopia without other visible abnormalities.

Purpose of the Study:

  • To investigate early changes in retinal function in myopic eyes.
  • To assess retinal function using multifocal electroretinography (multifocal ERG) across different myopia severities.

Main Methods:

  • Thirty young patients were grouped by refractive error: emmetropia/low, medium, and high myopia.
  • Multifocal ERG was performed using all-traces, rings, and quadrants grouping.
  • Analysis focused on amplitudes and latencies of multifocal ERG waves in relation to refractive error and axial length.

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Main Results:

  • Increased refractive error correlated with reduced amplitudes and delayed latencies in multifocal ERG.
  • Peripheral retinal areas showed more significant amplitude reduction in myopic groups.
  • These changes suggest an impact on retinal function even with normal visual acuity.

Conclusions:

  • Reduced amplitudes and delayed latencies in multifocal ERG are linked to myopia.
  • Cone function loss is the primary cause of these multifocal ERG changes in myopia.
  • Retinal functional deficits may occur in myopia before other ophthalmoscopic changes are evident.