Resting nystagmus may indicate what?

Resting nystagmus refers to an involuntary eye movement that occurs even when the eyes are at rest, indicating that there may be underlying medical issues. This eye movement is not usually associated with intoxication and can be a sign of various medical conditions that affect the vestibular system, central nervous system, or can sometimes indicate neurological disorders.

While increased intoxication levels typically result in the symptoms associated with horizontal or vertical gaze nystagmus during the administration of field sobriety tests, resting nystagmus suggests other health concerns. These could include conditions such as inner ear disorders, complications from head injuries, or other medical issues unrelated to alcohol or drug impairment.

Other options like high blood pressure and presence of fatigue may cause various symptoms, but neither directly relates to the significant indicator of resting nystagmus. Thus, identifying resting nystagmus highlights the need for a medical evaluation rather than attributing it solely to intoxication or fatigue.