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Doc Ophthalmol. 2019 Mar 18. doi: 10.1007/s10633-019-09686-7. [Epub ahead of print]

Comparison of electroretinographic measurements between tabletop and handheld stimulators in healthy subjects.

Author information

1
Department of Ophthalmology, Sanggye Paik Hospital, Inje University College of Medicine, Seoul, Korea.
2
Department of Ophthalmology, Busan Paik Hospital, Inje University College of Medicine, Busan, Korea.
3
Asan-si Healthcare Center, Asan-si, Chungcheongnam-do, Korea.
4
Department of Ophthalmology, Sanggye Paik Hospital, Inje University College of Medicine, Seoul, Korea. violentviolet15@daum.net.

Abstract

PURPOSE:

To compare full-field electroretinography (ffERG) parameters obtained from handheld and tabletop electroretinography (ERG) devices in normal subjects.

METHODS:

Twenty volunteers underwent ffERG using a tabletop and handheld stimulator. The responses obtained from the right eyes were compared. The coefficient of variation and intraclass correlation coefficient (ICC) were derived to assess inter- and intra-individual reliability.

RESULTS:

The b-wave in the rod response, a- and b-waves in the maximal combined response, a-wave in the cone response, and the 30-Hz flicker response showed significantly greater amplitudes when recorded with the tabletop stimulator than with the handheld stimulator. The implicit time of response (ITR) in the 30-Hz flicker response was longer when recorded with the handheld stimulator than when recorded with the tabletop stimulator. With regard to amplitude, the ICC indicated moderate-to-high reliability in the measurement of the b-wave in the rod response, and a- and b-waves in the maximal combined response. With regard to ITR, measurement of the b-wave in the rod response and a-wave in the maximal combined response showed moderate-to-high reliability.

CONCLUSION:

Despite the significantly lower ERG amplitude measurements recorded by the handheld stimulator, there were no significant differences in variability between the two stimulators.

KEYWORDS:

Full-field electroretinography; Handheld stimulator; Normal subjects; Tabletop stimulator

PMID:
30887263
DOI:
10.1007/s10633-019-09686-7

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