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Flicker electroretinograms of eyes with cataract recorded with RETeval system before and after mydriasis

PURPOSE: The aim of this study is to determine the effect of pupil size of eyes with cataracts on the flicker electroretinograms (ERGs) elicited and recorded with the RETeval system. PATIENTS AND METHODS: Forty-one eyes of 41 patients (mean age, 76.5±7.3 years) that had grade 2 nuclear or cortical c...

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Autores principales: Miura, Gen, Baba, Takayuki, Oshitari, Toshiyuki, Yamamoto, Shuichi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Dove Medical Press 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5840279/
https://www.ncbi.nlm.nih.gov/pubmed/29535500
http://dx.doi.org/10.2147/OPTH.S157505
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author Miura, Gen
Baba, Takayuki
Oshitari, Toshiyuki
Yamamoto, Shuichi
author_facet Miura, Gen
Baba, Takayuki
Oshitari, Toshiyuki
Yamamoto, Shuichi
author_sort Miura, Gen
collection PubMed
description PURPOSE: The aim of this study is to determine the effect of pupil size of eyes with cataracts on the flicker electroretinograms (ERGs) elicited and recorded with the RETeval system. PATIENTS AND METHODS: Forty-one eyes of 41 patients (mean age, 76.5±7.3 years) that had grade 2 nuclear or cortical cataract without any other abnormalities were studied. Flicker ERGs were recorded before and after mydriatic drops instillation. The ERGs were elicited by the white light delivered at the frequency of 28.3 Hz and intensities of 2, 8, and 32 Td-s. The amplitudes and the implicit times of the flicker ERGs before and after mydriasis were compared. RESULTS: There were no significant differences between the amplitudes before and after mydriasis (P=0.35, 2 Td-s; P=0.31, 8 Td-s; P=0.50, 32 Td-s). There were also no significant differences between the implicit times before and after mydriasis (P=0.86, 2 Td-s; P=0.98, 8 Td-s; P=0.95, 32 Td-s). The mean amplitudes and implicit times of the nuclear and cortical cataracts groups before the mydriasis were also not significantly different from those after mydriasis for all stimulus intensities. CONCLUSION: The lack of significant differences in the amplitudes and the implicit times of the flicker ERG of cataractous eyes before and after mydriasis indicated that the RETeval flicker ERGs in cataractous eyes is less affected by the pupil diameter. With our earlier study, it was assumed that the effect of cataracts on the RETeval flicker ERGs was due to the opacity of the crystalline lens, and the influence of the cataract would not be reduced or increased by mydriasis.
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spelling pubmed-58402792018-03-13 Flicker electroretinograms of eyes with cataract recorded with RETeval system before and after mydriasis Miura, Gen Baba, Takayuki Oshitari, Toshiyuki Yamamoto, Shuichi Clin Ophthalmol Original Research PURPOSE: The aim of this study is to determine the effect of pupil size of eyes with cataracts on the flicker electroretinograms (ERGs) elicited and recorded with the RETeval system. PATIENTS AND METHODS: Forty-one eyes of 41 patients (mean age, 76.5±7.3 years) that had grade 2 nuclear or cortical cataract without any other abnormalities were studied. Flicker ERGs were recorded before and after mydriatic drops instillation. The ERGs were elicited by the white light delivered at the frequency of 28.3 Hz and intensities of 2, 8, and 32 Td-s. The amplitudes and the implicit times of the flicker ERGs before and after mydriasis were compared. RESULTS: There were no significant differences between the amplitudes before and after mydriasis (P=0.35, 2 Td-s; P=0.31, 8 Td-s; P=0.50, 32 Td-s). There were also no significant differences between the implicit times before and after mydriasis (P=0.86, 2 Td-s; P=0.98, 8 Td-s; P=0.95, 32 Td-s). The mean amplitudes and implicit times of the nuclear and cortical cataracts groups before the mydriasis were also not significantly different from those after mydriasis for all stimulus intensities. CONCLUSION: The lack of significant differences in the amplitudes and the implicit times of the flicker ERG of cataractous eyes before and after mydriasis indicated that the RETeval flicker ERGs in cataractous eyes is less affected by the pupil diameter. With our earlier study, it was assumed that the effect of cataracts on the RETeval flicker ERGs was due to the opacity of the crystalline lens, and the influence of the cataract would not be reduced or increased by mydriasis. Dove Medical Press 2018-03-01 /pmc/articles/PMC5840279/ /pubmed/29535500 http://dx.doi.org/10.2147/OPTH.S157505 Text en © 2018 Miura et al. This work is published and licensed by Dove Medical Press Limited The full terms of this license are available at https://www.dovepress.com/terms.php and incorporate the Creative Commons Attribution – Non Commercial (unported, v3.0) License (http://creativecommons.org/licenses/by-nc/3.0/). By accessing the work you hereby accept the Terms. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed.
spellingShingle Original Research
Miura, Gen
Baba, Takayuki
Oshitari, Toshiyuki
Yamamoto, Shuichi
Flicker electroretinograms of eyes with cataract recorded with RETeval system before and after mydriasis
title Flicker electroretinograms of eyes with cataract recorded with RETeval system before and after mydriasis
title_full Flicker electroretinograms of eyes with cataract recorded with RETeval system before and after mydriasis
title_fullStr Flicker electroretinograms of eyes with cataract recorded with RETeval system before and after mydriasis
title_full_unstemmed Flicker electroretinograms of eyes with cataract recorded with RETeval system before and after mydriasis
title_short Flicker electroretinograms of eyes with cataract recorded with RETeval system before and after mydriasis
title_sort flicker electroretinograms of eyes with cataract recorded with reteval system before and after mydriasis
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5840279/
https://www.ncbi.nlm.nih.gov/pubmed/29535500
http://dx.doi.org/10.2147/OPTH.S157505
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