What is a general indicator of dissociative anesthetic use?

Nystagmus, which is characterized by rapid, involuntary eye movements, is a well-documented physiological response associated with the use of dissociative anesthetics, such as PCP (phencyclidine) and Ketamine. These substances can significantly affect the central nervous system, leading to various sensory and perceptual distortions, including nystagmus.

While the other options may reflect certain behavioral or psychological effects that could occur with illicit drug use, they are not specifically indicative of dissociative anesthetics. Poor balance can happen due to various intoxications or medical conditions, visions of reality is a vague term and not a recognized symptom, and heightened confidence, often referred to as a euphoric effect, is more typically associated with stimulants or certain depressants. Nystagmus, however, is a clear, observable sign that law enforcement can utilize as an indicator of dissociative anesthetic impairment, making it the appropriate choice in this context.