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Related Experiment Videos

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
PubMed
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.

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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).

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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.