Incremental Vestibulo-ocular Reflex Adaptation as a Novel Treatment for Dizziness in People With Multiple Sclerosis

Inclusion Criteria: * Neurologist-confirmed diagnosis of primary progressive or relapsing and remitting MS per The 2017 Revision of the McDonald Criteria and the Magnetic Resonance Imaging in MS, or a healthy volunteer without a diagnosis of multiple sclerosis or any related neurological conditions * Fluent in speaking and understanding English * Subjects with multiple sclerosis have self-reported vestibular symptoms of dizziness, imbalance, and/or a history of at least two falls in the prior 12 months Exclusion Criteria: * Clinically isolated syndrome or radiologically isolated syndrome. * Worsening MS symptoms during the prior 60 days * Immunotherapy change in the prior 60 days * Self-reported cognitive impairment that limits independence with basic and instrumental activities of daily living * Systolic blood pressure \> 180 mmHg and/or diastolic blood pressure \> 90 mmHg at rest * Static visual acuity with correction of worse than 1.0 logMAR * Manifest ocular misalignment ≥ 5 diopters (e.g., tropia, lazy eye, strabismus} * Convergence insufficiency * Intra-nuclear ophthalmoplegia * Vestibular Migraine * Major orthopedic conditions that limit cervical spine range of motion or that alter walking * Self-reported current or potential for pregnancy during enrollment * Ongoing participation in vestibular rehabilitation for dizziness