Recording the oscillatory potentials of the electroretinogram with the DTL electrode.
Suprathreshold photopic oscillatory potentials recorded with a DTL electrode were compared to those obtained with a Lovac corneal electrode. The overall oscillatory potential response (sum of oscillatory potentials) recorded with the DTL electrode was half of that obtained with the Lovac electrode. However, there was no evidence of a selective attenuation (or amplification) of any given oscillatory potential with the DTL electrode. Similarly, the oscillatory potential relative amplitude ratios and the peak times of the oscillatory potentials were identical for both electrodes. Our findings clearly indicate that the DTL electrode is adequate to record the high-frequency oscillatory potentials. Given the low cost and ease of use, as well as the disposable nature of the DTL electrode, we believe that electroretinographic specialists should seriously consider a wider utilization.
Lachapelle
P
P
Department of Ophthalmology, McGill University-Montreal Children's Hospital, Quebec, Canada.
Benoit
J
J
Little
J M
JM
Lachapelle
B
B
D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D003623:Dark Adaptation; D004566:Electrodes; D004596:Electroretinography / Q000295:instrumentation* / Q000379:methods; D005260:Female; D006801:Humans; D008027:Light; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D012160:Retina / Q000502:physiology*; D012684:Sensory Thresholds