Figure 1.

Results of video head impulse video head impulse test (vHIT) testing. For right-sided impulses (red boxes), the lower lines indicate the head movements, and the upper lines indicate eyes movements. For left-sided impulses (blue boxes), the upper lines indicate head movements, and the lower lines indicate eyes movement. (1a,1b) vHIT obtained before the patient cochlear implantation. Gain values were within normal, and no refixation saccades were observed. (2a,2b) vHIT from the day after the cochlear implantation. Gain values were within normal ranges. Refixation saccades with a peak velocity of maximum of 100°/s were observed bilaterally. The examiner observed the saccades on the computer screen during examination and were therefore not the result of artifacts. (3a,3b) Gain values were still within normal, and no refixation saccades were observed one month after the surgery.