Document Detail

The repeatability and variability of the multifocal electroretinogram for four different electrodes.
MedLine Citation:
PMID:  9666928     Owner:  NLM     Status:  MEDLINE    
Multifocal electroretinograms were recorded from twelve subjects on three separate days using the Visual Evoked Response Imaging System (VERIS). The subjects were 18-40 years-of-age. Each recording session was separated by an interval of between one and 16 weeks. Four electrode types were compared: the JET contact lens electrode, the gold foil electrode, the DTL thread electrode and the carbon fibre (c-glide) electrode. The b-wave amplitude density (nV/sq.deg) recorded with each electrode was measured. The mean amplitude density recorded at each session for each subject and each electrode was calculated and compared. There were no significant differences in amplitude density for the ERGs recorded with each type of electrode over the three days. The coefficient of variation for each electrode and each subject was then calculated using the results for the three days. The coefficients of variation for each electrode showed significant differences (One-way ANOVA: F = 4.51, d.f. = 3.44, P < 0.008). The c-glide electrode results had the highest variability and post hoc tests showed that its coefficient of variation was significantly different from those of the JET and gold foil electrodes but not from that of the DTL thread electrode.
N Mohidin; M K Yap; R J Jacobs
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists)     Volume:  17     ISSN:  0275-5408     ISO Abbreviation:  Ophthalmic Physiol Opt     Publication Date:  1997 Nov 
Date Detail:
Created Date:  1998-07-28     Completed Date:  1998-07-28     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8208839     Medline TA:  Ophthalmic Physiol Opt     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  530-5     Citation Subset:  IM    
Department of Optometry and Vision Science, University of Auckland, New Zealand.
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MeSH Terms
Electroretinography / instrumentation,  methods
Evoked Potentials, Visual*
Reproducibility of Results

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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