Fundus controlled silent substitution stimulation of the human eye

S. Klee*, D. Link, P. Bessler, J. Haueisen

*Corresponding author for this work

Research output: Contribution to book/report/conference proceedingContribution to conference proceeding

Abstract

A problem of stimulators used for electrophysiological examination of the human retina is the impossibility of active stimuli controlling on the fundus. They suffer from lacking information about the retinal area actually stimulated. In this work we present the first application of a novel fundus controlled digital color LCoS (Liquid Crystal on Silicon) projection stimulator. We determined the possibilities for an excitation of the Scone as well as the L- and M-cone pathway. Therefore we used the Silent Substitution Technique (SST) and imaged two different flash sequences on the fundus of three volunteers. Simultaneously to the stimulation electroencephalographic measurements were performed, followed by an analysis of the visual-evoked cortical potentials (VEPs). As a result we observed typical SST-VEP components. Additionally we discovered a time delay of the S-cone response in comparison to the L- and M-cone response. This suggests an effective stimulation of the different pathways.

Original languageEnglish
Title of host publicationWorld Congress on Medical Physics and Biomedical Engineering
Subtitle of host publicationBiomedical Engineering for Audiology, Ophthalmology, Emergency and Dental Medicine
PublisherSpringer Verlag
Pages219-222
Number of pages4
Edition11
ISBN (Print)9783642038907
DOIs
Publication statusPublished - 2009
Externally publishedYes
EventWorld Congress on Medical Physics and Biomedical Engineering: Biomedical Engineering for Audiology, Ophthalmology, Emergency and Dental Medicine - Munich, Germany
Duration: 07 Sept 200912 Sept 2009

Publication series

NameIFMBE Proceedings
Number11
Volume25
ISSN (Print)1680-0737

Conference

ConferenceWorld Congress on Medical Physics and Biomedical Engineering: Biomedical Engineering for Audiology, Ophthalmology, Emergency and Dental Medicine
Country/TerritoryGermany
CityMunich
Period07.09.200912.09.2009

Keywords

  • Cones
  • Fundus camera
  • LCoS stimulator
  • SST
  • VEP

ASJC Scopus subject areas

  • Bioengineering
  • Biomedical Engineering

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