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Proceedings Paper

Scanning laser ophthalmoscopy: a new tool in vision and oculomotor research
Author(s): Dietmar Ott; Knut Holthoff; Martin H. Lades; Rolf Eckmiller
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Paper Abstract

A new optical method for measuring eye movements in three dimensions is presented. It is based on imaging the ocular fundus with a scanning laser ophthalmoscope (SLO) and determining the rotational state of the eye from the positions of retinal features in subsequent images. The hardware required for image acquisition as well as algorithms for image correction fundus tracking and 3-D data processing are described. The method operates linearly within deg about the primary eye position with an angular resolution of 0. 1 deg and a sampling rate of 50 Hz. The kinematic parameters of an eye rotation are expressed as (1) rotation vector (2) Euler angles and (3) quaternions. Additionally the SLO allows precise retinotopic visual stimulation (via modulating the laser intensity) thereby rendering the evaluation of the correlation between stimulus movements and eye movements feasible. Examples of eye movement recordings are presented. 1.

Paper Details

Date Published: 1 November 1990
PDF: 10 pages
Proc. SPIE 1357, Medtech '89: Medical Imaging, (1 November 1990); doi: 10.1117/12.23933
Show Author Affiliations
Dietmar Ott, Heinrich-Heine-Univ. Duesseldorf (Germany)
Knut Holthoff, Heinrich-Heine-Univ. Duesseldorf (Germany)
Martin H. Lades, Univ. of Southern California (United States)
Rolf Eckmiller, Heinrich-Heine-Univ. Duesseldorf (Germany)

Published in SPIE Proceedings Vol. 1357:
Medtech '89: Medical Imaging
Volkmar Miszalok, Editor(s)

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