3D Fick coordinate system - UNDER CONSTRUCTION

The Fick coordinate system is a 3D coordinate system that is used specifically by vision scientists for specifying orientations of the eyes in the head.

In short, in this system, the vertical axis is fixed to the skull, and the horizontal axis rotates gimbal fashion. The order of the rotations thus matters.

Links

Section "coordinate systems for eye movements" in: Howard, I. P., & Rogers, B. J. (2008). Chapter 9. Vergence eye movements. In Seeing in Depth (Vol. 1). Oxford University Press. https://doi.org/10.1093/acprof:oso/9780195367607.003.0009

Haslwanter, T. (1995). Mathematics of three-dimensional eye rotations. Vision Res, 35, 1727–1739. https://doi.org/10.1016/0042-6989(94)00257-M

Quaia, C., & Optican, L. M. (2003). Three-dimensional rotation of the eyes. In Adler’s Physiology of the Eye, 10th Edition. Kaufman & Alm, Eds.