1 / 3 Show Caption + Hide Caption – Staff Sgt. Jesus Medina, performs the Horizontal Gaze Nystagmus (HGN) test at the Sierra Vista Police Department during an HGN course June 7-9.

Burns allegedly consented to a field sobriety test, and an officer conducted a horizontal gaze nystagmus test, which checks for alcohol impairment by observing how smoothly the eyes can move.

The officer could then give the person a Horizontal Gaze Nystagmus examination, an eye test that can help detect whether or not someone is intoxicated. Advertisement. Advertisement.

At that point, if the officer smells or can detect the presence of alcohol, they will ask the person if they have been drinking. The officer could then give the person a Horizontal Gaze Nystagmus ...

Officers conducted a Horizontal Gaze Nystagmus test, Walk and Turn test, and One-Leg-Stand test where Rios showed “slurred speech and issue constructing sentences” during the investigation ...

The horizontal gaze nystagmus measures involuntary jerking of the eye, she said. “If the officer feels someone has failed their SFSTS, they may ask the operator to blow into a portable breath ...