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How do the eyes track objects while head and objects are in motion?

The translational vestibuloocular reflex (tVOR) stabilizes gaze in response to translational
movements. This is a complicated task because the peripheral otolith organs respond
identically to tilt and to linear translation, whereas the ocular response to these stimuli differ;
tilting of the head (sensing gravity) elicits torsional eye movements, whereas translations
elicit horizontal eye movements. In addition, to accurately maintain images on the fovea, the
brain must consider the target distance and eccentricity of the image with respect to each eye.

http://jn.physiology.org/cgi/content/full/82/4/2010