Documenta Ophthalmologica

, Volume 113, Issue 3, pp 187–192 | Cite as

The influence of luminance on the multifocal ERG

Original paper

Abstract

Purpose

To assess the efficacy of high luminance in increasing the amplitude of the multifocal electroretinogram (mfERG). We examined 5 male and 5 female volunteers in the age of 22–52 years (median 28 years). Three different stimulus luminance levels were applied: the bright areas of the stimulus pattern were set to 150, 300 and 500 cd/m2. We recorded the potentials via DTL electrodes using the VERIS Science 4.4 system with 61 hexagons, pupils were dilated. Analysis was based on the 5 ring averages.

Results

Across all hexagons and subjects, the response density (∼amplitude) rose by 20% when increasing the luminance by a factor of 3.3. The peak times decreased slightly with higher luminance, by less then 1.5 ms.

Conclusions

Combining the present results with those from two previous studies, the gain (= relative amplitude increase for relative luminance increase) is close to 0.4 over a range of 56–700 cd/m2. The stimulus luminance range suggested in the mfERG guidelines seems well chosen.

Keywords

Amplitude Luminance mfERG Multifocal ERG Peak time 

Abbreviations

mfERG

Multifocal ERG

CRT

Cathode ray tube

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Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  1. 1.Eye DepartmentArrowe Park HospitalMerseysideUK
  2. 2.Sektion Funktionelle SehforschungUniversitäts-AugenklinikFreiburgGermany

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