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Abstract #9771 Published in IGR 5-3
The multifocal electroretinogram
Hood DC; Odel JG; Chen CS; Winn BJJournal of Neuro-Ophthalmology 2003; 23: 225-235
The multifocal electroretinogram (mfERG) technique allows local ERG responses to be recorded simultaneously from many regions of the retina. As in the case of full-field ERG, the ganglion cells contribute relatively little to the response, which originates largely from the outer retina. mfERG is particularly valuable in cases in which the fundus appears normal, and it is difficult to distinguish between diseases of the outer retina and diseases of the ganglion cells and/or optic nerve. mfERG can also help to differentiate between outer retinal diseases, to follow the progression of retinal diseases, and, with the addition of the mfVEP, to differentiate between organic and nonorganic causes of visual loss. However, because the difficulties encountered in recording and analyzing mfERG responses are greater than those involved in full-field ERG testing, mfERG testing is best left to centers with an electrophysiologist familiar with the mfERG test. Although this technique is relatively new and standards are still being developed, centers capable of recording reliable mfERG responses can be found in hundreds of locations around the world.
Dr. D.C. Hood, Department of Psychology, Columbia University, 405 Schermerhorn, New York, NY 10027, USA
Classification:
6.7 Electro-ophthalmodiagnosis (Part of: 6 Clinical examination methods)
