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[Normal values of retinal response densities in multifocal electroretinogram]
M Kondo1, Y Miyake, M Horiguchi
1Department of Ophthalmology, Nagoya University School of Medicine, Aichi-ken, Japan.
Nippon Ganka Gakkai Zasshi
|October 1, 1996
Summary
Multifocal electroretinograms revealed higher cone responses in temporal retina near the fovea. This spatial distribution and individual variation in retinal response density are crucial for clinical multifocal ERG applications.
Area of Science:
- Ophthalmology
- Neuroscience
- Visual Science
Context:
- Understanding the spatial distribution of retinal function is essential for interpreting visual evoked potentials.
- Multifocal electroretinography (mfERG) provides localized responses from the retina.
- Cone photoreceptor function varies across the retina, particularly near the fovea.
Purpose:
- To investigate the spatial distribution of local cone responses using multifocal electroretinography (mfERG).
- To assess the inter-individual variation in retinal response density.
- To provide data relevant for the clinical application of mfERG.
Summary:
- Multifocal electroretinograms (mfERG) were recorded from 21 normal eyes, adjusting for refractive lens effects.
- A significant nasal-temporal asymmetry was found near the fovea, with greater response density in the temporal retina along the horizontal meridian.
- No significant supero-inferior asymmetry was observed. The average coefficient of variation for retinal response density was 0.35.
Impact:
- The findings highlight important spatial variations in retinal cone function.
- Results indicate that mfERG interpretation must account for nasal-temporal asymmetry and individual variability.
- This research informs the clinical use of mfERG for diagnosing and monitoring retinal diseases.