The video head impulse test: a right–left imbalance
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The head impulse test (HIT) was first described as a clinical bedside test in 1988  and since then has become the main bedside test for the evaluation of function of the vestibulo-ocular reflex (VOR). For many years, the HIT was evaluated clinically, and was largely based on the examiner’s ability to correctly perform the test and to detect catch-up saccades.
In recent years, smartphone technology has led to the development of smaller cameras with higher spatial and temporal resolution, also allowing eye tracking with video-oculography (VOG) to expand to VOG-assisted HIT recordings, leading to the video HIT (vHIT) [2, 3, 4]. The vHIT has evolved in the last years into a valuable and widely used diagnostic tool for evaluating dizzy patients, by helping quantify the VOR gain  and being superior to the bedside HIT . Commercially available devices include the ICS Impulse™ and the EyeSeeCamHIT™.
Although often used there are still some methodological questions to be...
KeywordsVertigo Dizziness Video head impulse test Vestibular testing Vestibulo-ocular reflex Normal subjects
Compliance with ethical standards
Conflicts of interest
The authors report no conflict of interest.
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