Comparing the accuracy of video-oculography and the scleral search coil system in human eye movement analysis

The measurement of eye movements in three dimensions is an important tool to investigate the human vestibular and oculomotor system. The primary methods for three dimensional eye movement measurement are the scleral search coil system (SSCS) and video-oculography (VOG). In the present study, we comp...

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Bibliographic Details
Published in:Auris, nasus, larynx nasus, larynx, 2005-03, Vol.32 (1), p.3-9
Main Authors: Imai, Takao, Sekine, Kazunori, Hattori, Kousuke, Takeda, Noriaki, Koizuka, Izumi, Nakamae, Koji, Miura, Katsuyoshi, Fujioka, Hiromu, Kubo, Takeshi
Format: Article
Language:English
Subjects:
Adult
Human eye movement
Humans
Imaging, Three-Dimensional - statistics & numerical data
Male
Middle Aged
Models, Anatomic
Nystagmus, Optokinetic - physiology
Optokinetic nystagmus
Reflex, Vestibulo-Ocular - physiology
Saccade
Saccades - physiology
Sclera - physiology
Smooth pursuit
Torsional vestibulo-ocular reflex
Video Recording - standards
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Summary:The measurement of eye movements in three dimensions is an important tool to investigate the human vestibular and oculomotor system. The primary methods for three dimensional eye movement measurement are the scleral search coil system (SSCS) and video-oculography (VOG). In the present study, we compare the accuracy of VOG with that of SSCS using an artificial eye. We then analyzed the Y (pitch) and Z (yaw) component of human eye movements during saccades, smooth pursuit and optokinetic nystagmus, and the X (roll) component of human eye movement during the torsional vestibulo-ocular reflex induced by rotation in normal subjects, using simultaneous VOG and SSCS measures. The coefficients of the linear relationship between the angle of a simulated eyeball and the angle measured by both VOG and SSCS was almost unity with y-intercepts close to zero for torsional ( X), vertical ( Y) and horizontal ( Z) movements, indicating that the in vitro accuracy of VOG was similar to that of SSCS. The average difference between VOG and SSCS was 0.56°, 0.78° and 0.18° for the X, Y and Z components of human eye movements, respectively. Both the in vitro and in vivo comparisons demonstrate that VOG has accuracy comparable to SSCS, and is a reliable method for measurement of three dimensions (3D) human eye movements.
ISSN:0385-8146
1879-1476
DOI:10.1016/j.anl.2004.11.009