[Reproducibility and wave analysis of multifocal electroretinography]

Area of Science:

• Ophthalmology
• Neuroscience
• Physiology

Context:

• Multifocal electroretinography (mfERG) is a crucial diagnostic tool for assessing retinal function.
• Evaluating the reproducibility of mfERG is essential for reliable clinical interpretation and research.
• Previous studies have highlighted variability in mfERG measurements, necessitating further investigation into influencing factors.

Purpose:

• To investigate the reproducibility of multifocal electroretinography (mfERG) in healthy subjects.
• To identify factors affecting mfERG reproducibility, such as fixation and blinking.
• To analyze the correlation between mfERG response density and wave parameters (amplitude and latency).

Summary:

• Nine healthy males (ages 19-42) underwent repeated mfERG measurements using a VERIS III system.
• Reproducibility, measured by the coefficient of variation, averaged 22% overall, improving to 15% with good fixation and no blinking.
• Response density in mfERG correlated with amplitude but not latency in normal subjects.

Impact:

• Establishes benchmarks for mfERG reproducibility in a healthy population.
• Identifies poor fixation and blinking as key factors impacting mfERG reliability.
• Provides insights into the relationship between mfERG response density, amplitude, and latency, aiding in the interpretation of retinal function.