Purpose: Discussing the testing procedure of multifocal electroretinography(ERG).
Methods: The testing procedure of 131 multifocal ERG records was reviewed.
Results: Some variable factors existed in the measurement of multifocal ERG. These factors included the subject's co-operation, the mounting of electrode, the fixation of tested eye and adjustment of focus. The good records of multifocal ERG depend upon the skill of the operator.
Conclusion: The testing procedure of multifocal ERG must be standardized so as to ensure the reliability and repeatability of the results.