Retinal electrophysiological changes related to early versus late silicone oil removal.
PURPOSE
To compare between the effect of early (3 months) and late (6 months) silicone removal on the electroretinogram records.


METHODS
Thirty-four eyes with complex primary rhegmatogenous macula off retinal detachment undergone vitrectomy. Silicone oil was removed after 3 months in group I and after 6 months in group II. Scotopic and photopic ERGs, pattern electroretinogram (PERG) and multifocal ERG (mfERG) and best-corrected visual acuity (BCVA) were recorded for all eyes RESULTS: Preoperative mean best corrected visual acuity (BCVA) measured was 0.93 ± 0.05 in group I and 0.9 ± 0.08 in group II. One month after silicone removal, mean BCVA was 0.20 ± 0.04 and 0.18 ± 0.02 in groups I and II respectively. Before silicone oil removal the electroretinographic a- and b-waves were greatly reduced in both groups with no significant difference between them. One month after removal of silicone oil, the electroretinographic a- and b-waves increased in both groups with no significant difference between the two groups (p = 0.46 and 0.23 respectively).


CONCLUSION
The amplitudes of the ERGs increase after removal of silicone oil tamponade with no difference between early (3 months) and late (6 months) removal.
['Al-Nashar|Haitham Y|HY|http://orcid.org/0000-0001-9275-3904', 'Dabbour|Sherif A|SA|', 'Alnaimy|Mohammed A|MA|']
D005500:Follow-Up Studies D006801:Humans D012163:Retinal Detachment D012827:Silicone Oils D014792:Visual Acuity D014821:Vitrectomy
Silicone oil Electroretinogram Scotopic response Vitrectomy photopic response