Video Nystagmography (VNG) Testing

An advanced, non-invasive diagnostic evaluation using infrared video goggles to record involuntary eye movements (nystagmus) and assess vestibular, oculomotor, and brain function—particularly useful for dizziness, vertigo, and post-concussion symptoms.

Concussions often disrupt the vestibulo-ocular reflex and eye-tracking, causing persistent imbalance or visual issues even when imaging is normal. VNG objectively measures these subtle changes through a battery of targeted sub-tests.

Key components evaluated include:

• Spontaneous and gaze-evoked nystagmus
• Positional and positioning testing
• Saccades and smooth pursuits
• Optokinetic responses
• Vestibulo-ocular reflex (VOR) during head motion
• Caloric stimulation (warm/cool in ear canals)

VNG testing is used in two primary ways:

1. Diagnostic Evaluation — Identifies vestibular or central abnormalities contributing to post-injury symptoms like dizziness or unsteadiness.
2. Progress Monitoring — Tracks improvements in eye movement and balance function during rehabilitation.

The procedure takes 45–90 minutes in a darkened room with lightweight goggles (non-invasive, safe for most patients). Mild temporary dizziness may occur but resolves quickly. It is a key objective tool in comprehensive care, combined with other assessments and clinical judgment.

Benefits of Video Nystagmography (VNG) Testing

• Delivers precise, objective data on vestibular and eye movement function
• Differentiates peripheral (inner ear) vs. central (brain) causes of symptoms
• Detects post-concussion deficits contributing to ongoing dizziness or imbalance
• Guides targeted vestibular rehabilitation and therapy
• Supports recovery tracking and return-to-activity decisions

VNG is a gold-standard tool used in concussion clinics, neurology, ENT, and rehabilitation practices for accurate vestibular assessment.

If you're dealing with persistent dizziness, vertigo, or balance issues after a head injury, discuss VNG testing with one of our providers today.

Contact our office to schedule

For more information, explore resources from MedlinePlus, Cleveland Clinic, or specialized vestibular and concussion programs.