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KMID : 0360220080490010104
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Journal of the Korean Ophthalmological Society
2008 Volume.49 No. 1 p.104 ~ p.110
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Multifocal Electroretinogram before and after Epiretinal Membrane Surgery
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Kang Jae-Hoon
Choi Yun-Su
Yoon Jae-Moon
Yoon Hee-Sung
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Abstract
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Purpose : To assess macular function before and after vitrectomy and membrane removal in epiretinal
membranes by means of multifocal electroretinogram (mfERG).
Methods : The mfERGs (RETIscanⓡ, Roland, Germany) of 28 consecutive patients (28 eyes) with idiopathic
epiretinal membranes were recorded before epiretinal membrane surgery and 3 to 6 months after surgery. The
average retinal response density and implicit time of each local response were estimated as anatomic macular
areas corresponding roughly to 5 rings. Preoperative and postoperative responses of mfERG were compared.
The correlation of the change of retinal response density and postoperative macular configuration on optical
coherent tomography (OCT) was statistically analyzed.
Results : The postoperative value of P1 amplitude and implicit time were not statistically correlated with the
preoperative value (p>0.05). There were no significant correlations between the changes of rings 1 and 2 with
regard to the retinal response density of the mfERGs and visual acuity. There was no significant correlation
between the change of retinal response density and postoperative macular configuration according to OCT.
Conclusion : The use of mfERGs does not seem useful for predicting clinical prognosis after epiretinal
membrane surgery. Further studies of influence of internal limiting membrane removal on mfERG response
should be conducted.
J Korean Ophthalmol Soc 49(1):104-110, 2008
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KEYWORD
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Epiretinal membrane, Macular function, Multifocal electroretinogram
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