Multifocal technique: Difference between revisions

Revision as of 14:43, 14 August 2018

Revision as of 18:29, 21 February 2021

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The concept is as follows: Each visual field ___location is stimulated with a [[stimulus (physiology)|stimulus]] [[sequence]] that is [[correlation|uncorrelated]] to the sequences used for the other locations. All visual field locations are stimulated in parallel with their individual stimulus sequence. The retinal or cortical activity, which is a mixture of the responses from all visual field locations, is recorded with usual electroretinographic or visual evoked potential methods, respectively. Due to the independence of the stimulus sequences, the responses for each visual field ___location can be extracted using mathematical algorithms.

Mutifocal techniques, in particular the multifocal ERG, are used in the [[diagnosis]] of [[ophthalmology|ophthalmological]] diseases. The multifocal technique was developed in the early 1990s in the laboratory of Erich Sutter at the [[Smith-Kettlewell Eye Research Institute]]<ref>{{Cite journal|last=Hood|first=Donald C|date=2000-09|title=Assessing retinal function with the multifocal technique|url=https://linkinghub.elsevier.com/retrieve/pii/S1350946200000136|journal=Progress in Retinal and Eye Research|language=en|volume=19|issue=5|pages=607–646|doi=10.1016/S1350-9462(00)00013-6}}</ref><ref>{{Cite journal|last=Baseler|first=H.A.|last2=Sutter|first2=E.E.|last3=Klein|first3=S.A.|last4=Carney|first4=T.|date=1994-01|title=The topography of visual evoked response properties across the visual field|url=https://linkinghub.elsevier.com/retrieve/pii/0013469494901147|journal=Electroencephalography and Clinical Neurophysiology|language=en|volume=90|issue=1|pages=65–81|doi=10.1016/0013-4694(94)90114-7}}</ref><ref>{{Cite journal|last=Sutter|first=Erich E.|last2=Tran|first2=Duong|date=1992-03|title=The field topography of ERG components in man—I. The photopic luminance response|url=https://linkinghub.elsevier.com/retrieve/pii/004269899290235B|journal=Vision Research|language=en|volume=32|issue=3|pages=433–446|doi=10.1016/0042-6989(92)90235-B}}</ref>

Mutifocal techniques, in particular the multifocal ERG, are used in the [[diagnosis]] of [[ophthalmology|ophthalmological]] diseases.

==References==

{{Reflist}}