Electronystagmography (ENG) is a diagnostic test used to evaluate vestibular function and diagnose balance disorders. It measures eye movements by placing electrodes around the eyes while you follow visual stimuli or experience changes in head position. By analyzing these eye movements, ENG helps identify issues related to the inner ear or central nervous system that affect balance and coordination. This test provides critical information for diagnosing vertigo, dizziness, and other balance disorders, guiding effective treatment strategies.