What does HGN clue 2 indicate during a sobriety test?

HGN clue 2 refers to the observation of "distinct and sustained nystagmus at maximum deviation" during the Horizontal Gaze Nystagmus (HGN) test, which is a common field sobriety test used to evaluate potential intoxication. This phenomenon occurs when the eyes exhibit an involuntary jerking motion when they are moved to the side and held at the farthest point of their gaze.

In this context, "distinct" means that the nystagmus is clear and easily observable, while "sustained" indicates that the jerking remains noticeable for several seconds at the maximum deviation before returning to center. This clue is significant because it suggests that the individual may be under the influence of alcohol or drugs, as these substances can impair the vestibular system and lead to this aberration in eye movement.

Recognizing and interpreting HGN clues are essential components of conducting a proper sobriety test, as they provide objective indicators that can aid law enforcement officials in making informed decisions about a driver's level of impairment.