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JM Klancnik, R Foroozan, MT S Tennant, EL Affel, C Jordan, TR Vrabec; Multifocal Electroretinogram Responses in Healthy Volunteers Before and After Voluntary Suppression . Invest. Ophthalmol. Vis. Sci. 2002;43(13):1178.
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© ARVO (1962-2015); The Authors (2016-present)
Purpose: To describe multifocal electroretinogram (MERG) responses in eleven eyes of six healthy persons who suppressed their MERG responses. Methods: MERGs were recorded with the test pattern in best focus. A second MERG was recorded after blurring the pattern. Several individuals augmented suppression with inattention and poor fixation. Amplitude and latency of first (fMERG) and second (sMERG) order kernal MERG responses before and after attempted suppression. Results: Suppressed MERGs demonstrated reduced amplitude of fMERG and sMERG responses. In addition, the latency of N1, P1 and N2 of the fMERG were progressively more shortened. The sMERG latencies were variable. Conclusion: MERG responses may be suppressed voluntarily. Amplitude may be reduced markedly in fMERG and sMERG. Implicit time may be shortened most notably in fMERG.
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