Electroretinogram Changes following Silicone Oil Removal
Purpose: To evaluate electroretinogram (ERG) changes after silicone oil removal. Methods: Scotopic and photopic ERGs, and best-corrected visual acuity (BCVA) were checked before and shortly after silicone oil removal in eyes that had previously undergone vitrectomy and silicone oil injection for co...
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| Format: | Article |
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Knowledge E
2011-01-01
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| Series: | Journal of Ophthalmic & Vision Research |
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| Online Access: | http://www.jovr.org/article.asp?issn=2008-322X;year=2011;volume=6;issue=2;spage=109;epage=113;aulast=Azarmina |
| _version_ | 1811193531947024384 |
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| author | Mohsen Azarmina Masoud Soheilian Hossein Azarmina Bagher Hosseini |
| author_facet | Mohsen Azarmina Masoud Soheilian Hossein Azarmina Bagher Hosseini |
| author_sort | Mohsen Azarmina |
| collection | DOAJ |
| description | Purpose: To evaluate electroretinogram (ERG) changes after silicone oil removal.
Methods: Scotopic and photopic ERGs, and best-corrected visual acuity (BCVA) were checked before and shortly after silicone oil removal in eyes that had previously undergone vitrectomy and silicone oil injection for complex retinal detachment. Preand postoperative ERG a- and b-wave amplitudes were compared.
Results: Twenty-eight eyes of 28 patients including 20 male and 8 female subjects with mean age of 39.3 ± 0.06 (range, 12 to 85) years were studied. Mean interval from primary vitreoretinal surgery to silicone oil removal was 21.04 ± 0.52 (range, 7 to 39) months. Mean duration from silicone oil removal to second ERG was 13.04 ± 1.75 (range, 10 to 16) days. Before silicone oil removal, mean a-wave amplitudes in maximal combined response, rod response and cone response ERGs were 27.4 ± 19.9, 7.2 ± 4.5 and 5.5 ± 3.4 μv, respectively. These values increased to 48.8 ± 31.9, 15.1 ± 14.4 and 17.4 ± 22.2 μv, respectively after silicone oil removal (P < 0.001). Mean b-wave amplitudes in the same order, were 69.41 ± 51, 41.2 ± 30.4 and 25.1 ± 33.9 μv before silicone oil removal, increasing to 165.6 ± 102.5, 81.7 ± 53.7 and 44.7 ± 34.1 μv respectively, after silicone oil removal (P < 0.001). Mean BCVA significantly improved from 1.10 ± 0.34 at baseline to 1.02 ± 0.33 logMAR after silicone oil removal (P < 0.001).
Conclusion: The amplitudes of ERG a- and b-waves under scotopic and photopic conditions increased significantly shortly after silicone oil removal. An increase in BCVA was also observed. These changes may be explained by the insulating effect of silicone oil on the retina. |
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| format | Article |
| id | doaj.art-251e1e816e2442799b350afd65b61531 |
| institution | Directory Open Access Journal |
| issn | 2008-322X |
| language | English |
| last_indexed | 2024-04-12T00:10:08Z |
| publishDate | 2011-01-01 |
| publisher | Knowledge E |
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| spelling | doaj.art-251e1e816e2442799b350afd65b615312022-12-22T03:55:58ZengKnowledge EJournal of Ophthalmic & Vision Research2008-322X2011-01-0162109113Electroretinogram Changes following Silicone Oil RemovalMohsen AzarminaMasoud SoheilianHossein AzarminaBagher HosseiniPurpose: To evaluate electroretinogram (ERG) changes after silicone oil removal. Methods: Scotopic and photopic ERGs, and best-corrected visual acuity (BCVA) were checked before and shortly after silicone oil removal in eyes that had previously undergone vitrectomy and silicone oil injection for complex retinal detachment. Preand postoperative ERG a- and b-wave amplitudes were compared. Results: Twenty-eight eyes of 28 patients including 20 male and 8 female subjects with mean age of 39.3 ± 0.06 (range, 12 to 85) years were studied. Mean interval from primary vitreoretinal surgery to silicone oil removal was 21.04 ± 0.52 (range, 7 to 39) months. Mean duration from silicone oil removal to second ERG was 13.04 ± 1.75 (range, 10 to 16) days. Before silicone oil removal, mean a-wave amplitudes in maximal combined response, rod response and cone response ERGs were 27.4 ± 19.9, 7.2 ± 4.5 and 5.5 ± 3.4 μv, respectively. These values increased to 48.8 ± 31.9, 15.1 ± 14.4 and 17.4 ± 22.2 μv, respectively after silicone oil removal (P < 0.001). Mean b-wave amplitudes in the same order, were 69.41 ± 51, 41.2 ± 30.4 and 25.1 ± 33.9 μv before silicone oil removal, increasing to 165.6 ± 102.5, 81.7 ± 53.7 and 44.7 ± 34.1 μv respectively, after silicone oil removal (P < 0.001). Mean BCVA significantly improved from 1.10 ± 0.34 at baseline to 1.02 ± 0.33 logMAR after silicone oil removal (P < 0.001). Conclusion: The amplitudes of ERG a- and b-waves under scotopic and photopic conditions increased significantly shortly after silicone oil removal. An increase in BCVA was also observed. These changes may be explained by the insulating effect of silicone oil on the retina.http://www.jovr.org/article.asp?issn=2008-322X;year=2011;volume=6;issue=2;spage=109;epage=113;aulast=AzarminaVitrectomySilicone OilElectroretinogram |
| spellingShingle | Mohsen Azarmina Masoud Soheilian Hossein Azarmina Bagher Hosseini Electroretinogram Changes following Silicone Oil Removal Journal of Ophthalmic & Vision Research Vitrectomy Silicone Oil Electroretinogram |
| title | Electroretinogram Changes following Silicone Oil Removal |
| title_full | Electroretinogram Changes following Silicone Oil Removal |
| title_fullStr | Electroretinogram Changes following Silicone Oil Removal |
| title_full_unstemmed | Electroretinogram Changes following Silicone Oil Removal |
| title_short | Electroretinogram Changes following Silicone Oil Removal |
| title_sort | electroretinogram changes following silicone oil removal |
| topic | Vitrectomy Silicone Oil Electroretinogram |
| url | http://www.jovr.org/article.asp?issn=2008-322X;year=2011;volume=6;issue=2;spage=109;epage=113;aulast=Azarmina |
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