  We analyze the information that can be retrieved from the tracking parameters
produced by an innovative wearable eye tracker. The latter is based on a
permanent-magnet marked corneal lens and by an array of magnetoresistive
detectors that measure the magnetostatic field in several positions in the eye
proximity. We demonstrate that, despite missing information due to the axial
symmetry of the measured field, physiological constraints or measurement
conditions make possible to infer complete eye-pose data. Angular precision and
accuracy achieved with the current prototypical device are also assessed and
briefly discussed. The results show that the instrumentation considered is
suitable as a new, moderately invasive medical diagnostics for the
characterization of ocular movements and associated disorders.
