DWI
Detection and Standardized Field Sobriety Testing
Session
7 – Phase Three: Pre-Arrest Screening
Horizontal Gaze Nystagmus
Demonstration
7-10
To
test for Horizontal Gaze Nystagmus, the subject is instructed to stand with
feet
together,
hands at sides, hold the head still, and follow the motion of a stimulus with
the
eyes
only.
The
object may be the tip of a pen or penlight or the eraser on a pencil, which
contrasts
with
the background.
Each
eye is checked, beginning with the subject's left. A subject's height might
restrict
ability
to clearly see nystagmus. Subject may be placed in sitting position to
accommodate
a better view.
Two
or more "passes" are made before each eye, to look for each of the
clues of
nystagmus.
Subject
height may restrict ability to see nystagumus in those cases, a sitting
position
may
work.
DWI
Detection and Standardized Field Sobriety Testing
Session
7 – Phase Three: Pre-Arrest Screening
The Truth is in the Eyes
HGN Video
7-11
Notes:_______________________________________________
_____________________________________________________
_____________________________________________________
_____________________________________________________
_____________________________________________________
_____________________________________________________
_____________________________________________________
_____________________________________________________
_____________________________________________________
Notes:_______________________________________________
_____________________________________________________
_____________________________________________________
_____________________________________________________
_____________________________________________________
_____________________________________________________
_____________________________________________________
_____________________________________________________
_____________________________________________________
HS
178 R5/13 7 of 26
Standardized Field
Sobriety Testing
March 2013 Edition
No comments:
Post a Comment