A simplified calibration method for three-dimensional eye movement recordings using search-coils

K. Bartl; C. Siebold; S. Glasauer; C. Helmchen; U. Büttner

doi:10.1016/0042-6989(95)00201-4

A simplified calibration method for three-dimensional eye movement recordings using search-coils

K. Bartl, C. Siebold, S. Glasauer, C. Helmchen, U. Büttner^*

^*Corresponding author for this work

Clinic of Neurology

28 Citations (Scopus)

Abstract

An algorithm is presented which allows the calibration of three-dimensional eye movements in two magnetic fields with two search-coils in one eye, whose relative orientation does not have to be known. Prior to recordings a calibration cube is placed in front of the eye to measure real and apparent crosstalk, produced by imprecisely oriented horizontal or vertical magnetic fields, and to obtain a first approximation of offset voltages. For calibration it suffices if one point is fixated and, in addition, spontaneous eye movements for 30-60 sec are performed. Additional fixation points can be used to improve the calibration. Position quaternions are applied for computing eye movement recordings from man and monkey and to determine Listing's plane.

Original language	English
Journal	Vision Research
Volume	36
Issue number	7
Pages (from-to)	997-1006
Number of pages	10
ISSN	0042-6989
DOIs	https://doi.org/10.1016/0042-6989(95)00201-4
Publication status	Published - 01.01.1996

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Academic Focus: Center for Brain, Behavior and Metabolism (CBBM)

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10.1016/0042-6989(95)00201-4

Cite this

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AU - Siebold, C.

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AU - Helmchen, C.

AU - Büttner, U.

PY - 1996/1/1

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N2 - An algorithm is presented which allows the calibration of three-dimensional eye movements in two magnetic fields with two search-coils in one eye, whose relative orientation does not have to be known. Prior to recordings a calibration cube is placed in front of the eye to measure real and apparent crosstalk, produced by imprecisely oriented horizontal or vertical magnetic fields, and to obtain a first approximation of offset voltages. For calibration it suffices if one point is fixated and, in addition, spontaneous eye movements for 30-60 sec are performed. Additional fixation points can be used to improve the calibration. Position quaternions are applied for computing eye movement recordings from man and monkey and to determine Listing's plane.

AB - An algorithm is presented which allows the calibration of three-dimensional eye movements in two magnetic fields with two search-coils in one eye, whose relative orientation does not have to be known. Prior to recordings a calibration cube is placed in front of the eye to measure real and apparent crosstalk, produced by imprecisely oriented horizontal or vertical magnetic fields, and to obtain a first approximation of offset voltages. For calibration it suffices if one point is fixated and, in addition, spontaneous eye movements for 30-60 sec are performed. Additional fixation points can be used to improve the calibration. Position quaternions are applied for computing eye movement recordings from man and monkey and to determine Listing's plane.

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A simplified calibration method for three-dimensional eye movement recordings using search-coils

Abstract

Research Areas and Centers

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