horizontal gaze nystagmus test

noun
horizontal gaze ny·​stag·​mus test | \ -ni-ˈstag-məs- \

Legal Definition of horizontal gaze nystagmus 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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“Horizontal gaze nystagmus test.” Merriam-Webster.com Legal Dictionary, Merriam-Webster, https://www.merriam-webster.com/legal/horizontal%20gaze%20nystagmus%20test. Accessed 11 Aug. 2020.

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