| This
description of the Horizontal Gaze Nystagmus test
posted by Florida DUI Lawyer
. *
Parks
& Braxton, your best resource for a Florida
DUI Lawyer, wants you to be well informed.
Here is a basic description of the Horizontal
gaze nystagmus test:
- In
particular, NHTSA does not support the allegation
that onset angle of Nystagmus can reliably be
used to estimate BAC, and considers any such
estimation to be misuse of the Horizontal Gaze
Nystagmus test. The NJSP requires that the student
obtain 20 practice tests prior to being considered
certified in the Horizontal Gaze Nystagmus.
There is no time limit on when these tests can
be obtained. A refusal can not be considered
a practice test as the evaluation of the suspect
must be corroborated by a blood alcohol reading.
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The stimulus must be placed twelve to fifteen
inches in front of the suspect's face. The stimulus
should be held above eye level, so that the
eyes are wide open. Due to narrowness of certain
individuals eyes it becomes more difficult to
make a fair evaluation of the nystagmus unless
the eyes are wide open.
-
The officer cannot simply believe he sees nystagmus,
it must be obvious and distinct. The officer
is trained to have the suspect look into a quiet
background, away from the police cruiser overhead
lights and traffic passing in close proximity.
This may induce a condition known as opto-kinetic
nystagmus. Numerous visual or other distractions
may impede this test such as rain, snow, drizzle
and traffic, to name a few
*
This material is for informational purposes only.
If you want to know how the SFST tests affect
you, please contact Florida
DUI Lawyers, Parks &
Braxton
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