Among the three field sobriety tests that comprise the Standardized Field Sobriety Test (SFST), the Horizontal Gaze Nystagmus (HGN) test is unique in that it evaluates an involuntary physical reaction you cannot control. If you’ve been arrested for a DUI in Georgia, Attorney Simon Peed is here to help you understand and challenge the validity of this test.
How the HGN Test Works
During the HGN test, the officer asks you to follow an object, such as a pen or finger, with your eyes while keeping your head still. The officer observes your eyes for involuntary jerking motions, known as nystagmus, which can be linked to alcohol consumption. However, numerous factors unrelated to alcohol can cause similar eye movements.
Conditions That Can Cause HGN
Many medical and environmental factors may explain the presence of HGN, including but not limited to:
- Inner ear problems
- Head trauma (acute or chronic)
- Influenza or infections
- Neurological disorders (e.g., multiple sclerosis, brain hemorrhage)
- Eye strain or fatigue
- Glaucoma
- Exposure to environmental toxins or substances
- Prescription and over-the-counter medications (antihistamines, tranquilizers, etc.)
Without considering these alternative causes, the officer’s conclusions during the HGN test could be inaccurate or misleading.
Why the HGN Test is Problematic
- Subjectivity: The results rely entirely on the officer’s judgment, which may be influenced by bias or lack of proper training.
- Medical Complexity: Many conditions mimic nystagmus, making it unreliable as sole evidence of intoxication.
Build Your Defense
If you’ve been arrested for a DUI based on the HGN test, Attorney Simon Peed will thoroughly investigate your case, challenge the validity of the test, and highlight alternative causes for the officer’s observations. He has the specialized knowledge necessary to educate the court about the unreliability of this test and defend your rights.
Call Attorney Simon Peed today for a free, no-obligation consultation to discuss your DUI case and build a robust defense.
