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Comparing eye movements recorded by search coil and infrared eye tracking

Schmitt, Kai-Uwe ; Muser, Markus ; Lanz, Christian ; Walz, Felix ; Schwarz, Urs

In: Journal of Clinical Monitoring and Computing, 2007, vol. 21, no. 1, p. 49-53

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    Titre
    • Comparing eye movements recorded by search coil and infrared eye tracking
    Auteur
    • Schmitt, Kai-Uwe. Institute for Biomedical Engineering, ETH Zurich and University of Zurich, Gloriastrasse 35, 8092, Zurich, Switzerland
    • Muser, Markus. AGU Zürich, Winkelriedstrasse 27, 8006, Zurich, Switzerland
    • Lanz, Christian. AGU Zürich, Winkelriedstrasse 27, 8006, Zurich, Switzerland
    • Walz, Felix. AGU Zürich, Winkelriedstrasse 27, 8006, Zurich, Switzerland
    • Schwarz, Urs. Department of Neurology, University Hospital Zurich, Frauenklinikstrasse 26, 8091, Zurich, Switzerland
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Journal of Clinical Monitoring and Computing, 2007, vol. 21, no. 1, p. 49-53. Kluwer Academic Publishers
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:311290
    Summary
    Objective: The performance of a new video-based infrared eye tracker (IR) was compared to the magnetic search coil technique (SC). Since the IR offers interesting possibilities as a diagnostic tool in neuro-ophthalmology, it was investigated whether the new device has overcome shortcomings that were reported from former IR systems. Methods: Horizontal saccades were recorded using the IR and the SC. The IR allowed eye movement recordings at different sampling rates ranging from 250Hz to 1000Hz while the SC recorded at 1000Hz. Results/Conclusions: The results show that the IR and the SC were in good agreement and produced similar results. In contrast to other studies, the influence of the sampling rate of the IR was small. The saccade main-sequences did not show significant differences. The latency times observed for both systems were mainly in the short-latency range