Convergence on VOR Gain: Normal and Abnormal

Vestibular compensatory eye movements provide a mechanism to maintain steady fixation on targets during head movement. The anatomic pathways that mediate a normal horizontal vestibulo-ocular reflex (h-VOR), when lesioned, cause spontaneous nystagmus. While the effect of convergence on spontaneous nystagmus has been reported in various populations, the response to adaptation to near targets in patients with peripheral or central vestibular lesions has not been studied. We aim to clarify potential vestibular and near-reflex interactions by comparing the near and far h-VOR in normal volunteers to patients with unilateral peripheral and central vestibular lesions.