horizontal gaze nystagmus test


horizontal gaze ny·​stag·​mus test
: a test for intoxication (as of a driver) based on observation of involuntary jerking movements of the eyes as they follow horizontal motion

Note: This test is one of several usually administered by police officers to determine the sobriety of a suspected drunk driver.

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Cite this Entry

“Horizontal gaze nystagmus test.” Merriam-Webster.com Legal Dictionary, Merriam-Webster, https://www.merriam-webster.com/legal/horizontal%20gaze%20nystagmus%20test. Accessed 5 Mar. 2024.

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