Horizontal Gaze Nystagmus (HGN) checks for what?

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Multiple Choice

Horizontal Gaze Nystagmus (HGN) checks for what?

Explanation:
Horizontal Gaze Nystagmus looks for involuntary jerking of the eyes as they move side to side. When someone is impaired, signals controlling eye muscles become less precise, so the eyes exhibit a distinct, rhythmic jerking (nystagmus) as they track a moving target horizontally. This eye jerk is what the test is assessing, not pupil size, speed of eye movement, or iris color.

Horizontal Gaze Nystagmus looks for involuntary jerking of the eyes as they move side to side. When someone is impaired, signals controlling eye muscles become less precise, so the eyes exhibit a distinct, rhythmic jerking (nystagmus) as they track a moving target horizontally. This eye jerk is what the test is assessing, not pupil size, speed of eye movement, or iris color.

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