Answers are grounded in this paper and cite their sources.
A video technique is described to record ocular motions and positions of both eyes simultaneously in all degrees of freedom. This non-invasive method allows a 3-D positional analysis with free gaze directions and head tilts for measuring all ocular degrees of freedom, including torsion.
No takes yet. Share an insight, caveat, or question.
Wassill et al. (2001) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: