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- Vertical Gaze Nystagmus - Field Sobriety Tests
The officer will look for three clues indicating intoxication in each eye, for a total of six possible clues These include problems following the object smoothly, distinct nystagmus when you are looking all the way up or down and the onset of nystagmus before your eyes reach a 45 degree angle
- Standardized Field Sobriety Tests by Law Enforcement in DUI . . . - Justia
Vertical Gaze Nystagmus is an up and down jerking of the eyes which occurs when the eyes gaze upward at maximum elevation The presence of this type of nystagmus is associated with high doses of alcohol for that individual and certain other drugs
- Field Sobriety Test Review - Texas District County Attorneys Association
Vertical Nystagmus (VGN): Up and down jerking of the eyes as they are held in the upmost position The presence of VGN May indicate a high dose for that individual and will not be present without HGN
- Whats a Vertical Gaze Nystagmus Field Sobriety Test? - Michael . . .
Texas law enforcement officers usually conduct two types of nystagmus tests: horizontal gaze nystagmus and vertical gaze nystagmus tests Let’s break down what each one means, the steps of the test, and how to interpret the results
- Nystagmus testing in intoxicated individuals
Testing includes assessment of eye movements, using the Horizontal Gaze Nys-tagmus (HGN) and Vertical Gaze Nystagmus (VGN) tests, which are conducted at roadside by patrol officers These tests pre-viously have been validated when the subject is placed in a standing posture with head upright
- VGN – Vertical Gaze Nystagmus – Field Sobriety Test
The Vertical Gaze Nystagmus test – VGN – is the second nystagmus test given by a law enforcement officer after getting 4 or more clues on the HGN test This short YouTube video shows the eye movements that indicate VGN symptoms: Vertical Gaze Nystagmus Video
- Advanced Roadside Impaired Driving Enforcement
Describe the difference in pupil size Discuss Modified Romberg Balance test: How to administer properly and describe what the results indicate Explain the relationship between eye examinations and the seven drug categories
- Standardized Field Sobriety Tests
Check for Vertical Gaze Nystagmus (minimum 4 second hold) *Reminder: Always check the suspect’s left eye first, checking each eye twice 1 Lack of Smooth Pursuit 2 Distinct and Sustained Nystagmus at Maximum Deviation 3 Onset of Nystagmus Prior to 45 degrees *Reminder: Check for each clue in both eyes The maximum number of clues is six 1
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