Videooculography (VOG)

Videooculography (VOG) enables evaluation of three-dimensional eye movements, including horizontal, vertical, and torsional components. Recent technological advances have further enhanced VOG as both a research and clinical tool. Developments include quantitative analysis of nystagmus, examinations using visual stimuli, integration with filing systems, and high-speed video recording. High-speed VOG allows for more detailed capture of rapid eye movements as compared with conventional systems. We recorded eye movement responses to galvanic vestibular stimulation (GVS) using our VOG system. Horizontal and torsional nystagmus was observed, with responses depending on the polarity and intensity of the stimulation.