Original Research

Within-subject repeatability of scotopic ERG measurements

W. D. H. Gillan
African Vision and Eye Health | South African Optometrist: Vol 71, No 2 | a68 | DOI: https://doi.org/10.4102/aveh.v71i2.68 | © 2012 W. D. H. Gillan | This work is licensed under CC Attribution 4.0
Submitted: 09 December 2012 | Published: 09 December 2012

About the author(s)

W. D. H. Gillan, Department of Optometry, University of Johannesburg, South Africa

Full Text:



Therepeatability of data collected during clinical or research measurements needs to be considered by clinicians and researchers. Conclusions made relating to such measurements might be influenced improperly if an instrument proves to not be repeatable or accurate. The aim of this study was to invetigate the within-subject repeatability of scotopic electroretinogram (ERG) measurements.Ten ERGrecordings were recorded for each eye from six volunteers using a CSO Retimax electrophysiology system. Only one eye was dilated. The results
of this study support other researchers in their cautious approach regarding repeated ERG measurements. (S Afr Optom 2012 71(2) 64-69)


Electroretinography; electroretinograms; electrophysiology; repeatability; retinal function


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