Scanning laser ophthalmoscopy: a new tool in vision and oculomotor research

Dietmar Ott; Knut Holthoff; Martin H. Lades; Rolf Eckmiller

doi:10.1117/12.23933

1 November 1990 Scanning laser ophthalmoscopy: a new tool in vision and oculomotor research

Dietmar Ott, Knut Holthoff, Martin H. Lades, Rolf Eckmiller

Proceedings Volume 1357, Medtech '89: Medical Imaging; (1990) https://doi.org/10.1117/12.23933
Event: Medtech '89: Medical Imaging, 1990, Campinas, Brazil

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.

Citation Download Citation

Dietmar Ott, Knut Holthoff, Martin H. Lades, and Rolf Eckmiller "Scanning laser ophthalmoscopy: a new tool in vision and oculomotor research", Proc. SPIE 1357, Medtech '89: Medical Imaging, (1 November 1990); https://doi.org/10.1117/12.23933

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