Video-oculography

Video-oculography (VOG) is a non-invasive, video-based method of measuring horizontal, vertical and torsional position components of the movements of both eyes (eye tracking) using a head-mounted mask that is equipped with small cameras.

In contrast, the measurement of the torsional component (cyclorotation) is usually considered a computationally more difficult task.

Approaches to solving this problem include, among others, polar cross correlation methods and iris pattern matching/tracking.

[citation needed] For example, miniaturized ocular-videography systems are used to analyze eye movements in freely moving rodents.

It has also been proposed for assessing linear and torsional eye movements in vestibular patients[5][6] and for early stroke recognition.