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Pattern electroretinogram, visual evoked potential and psychophysical functions in maculopathy
A Junghardt1, H Wildberger, B Török
1Eye Clinic, Kantonsspital, Luzern, Switzerland.
Documenta Ophthalmologica. Advances in Ophthalmology
|January 1, 1995
Summary
Visual evoked potentials and visual acuity correlate well with static perimetry in maculopathy. Pattern electroretinograms show better correlation with smaller fields, unlike visual evoked potentials.
Area of Science:
- Ophthalmology
- Neuroscience
- Visual Electrophysiology
Background:
- Unilateral maculopathies affect central vision, necessitating accurate diagnostic tools.
- Comparing electrophysiological tests with psychophysical measures is crucial for understanding visual function in retinal diseases.
Purpose of the Study:
- To compare pattern electroretinograms (PERG) and visual evoked potentials (VEP) with psychophysical tests in unilateral maculopathies.
- To evaluate the influence of test field size on the correlation between these diagnostic methods.
Main Methods:
- 20 patients with unilateral maculopathies underwent PERG, VEP, and static perimetry (Octopus program M1) with varying field sizes (20°, 10°, 6°).
- Psychophysical tests included visual acuity, static perimetry, and color vision (desaturated panel D-15).
Main Results:
- Visual acuity, static perimetry, and VEP showed the best correlation across all field sizes.
- PERG correlated with static perimetry only in smaller fields (10°, 6°), not the largest (20°).
- No significant correlation was found between PERG and VEP or visual acuity.
Conclusions:
- VEP and visual acuity correlate well with static perimetry, even with different functional area integrations.
- Smaller stimulation fields may yield more precise results for PERG testing.
- Color vision disturbance did not correlate with other tested parameters.