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Using multifocal electroretinography hard exudates affect macular function in eyes with diabetic retinopathy
Kristina Holm1, Vesna Ponjavic, Monica Lövestam-Adrian
1Department of Ophthalmology, University of Lund, Lund, Sweden. Kristina.holm@med.lu.se
Summary
Diabetic retinopathy hard exudates negatively impact macular function, prolonging implicit time and reducing amplitude, independent of macular thickness. This indicates a significant deleterious effect on vision.
Area of Science:
- Ophthalmology
- Retinal Diseases
- Diabetic Retinopathy
Background:
- Diabetic retinopathy is a leading cause of vision loss.
- Hard exudates are a common complication, but their specific impact on macular function is not fully understood.
Purpose of the Study:
- To evaluate the influence of hard exudates on macular function in patients with diabetic retinopathy.
Main Methods:
- Thirty-seven eyes from 27 diabetic patients underwent fundus photography, multifocal electroretinography (mfERG), and optical coherence tomography (OCT).
- Patients were categorized into three groups based on the presence and location of hard exudates.
- mfERG responses and OCT values were compared across the groups.
Main Results:
- Hard exudates were associated with significantly prolonged implicit time in mfERG, particularly in the central and outer macular areas.
- Reduced mfERG amplitude was observed in eyes with hard exudates compared to those without.
- Macular thickness, as measured by OCT, did not differ significantly between groups.
Conclusions:
- Hard exudates adversely affect macular function in diabetic retinopathy, evidenced by prolonged implicit time and reduced amplitude.
- This functional impairment occurs independently of changes in macular thickness.
- The findings highlight the detrimental role of macular hard exudates on visual function.
