What is horizontal nystagmus?
horizontal nystagmus is an involuntary movement of the eye towards the right or left side of the occipital orbit. This is often seen in patients with large brain lesions on one hemisphere. The eye turns towards the healthy side of the brain and quickly moves back to the head side with lesions. A person with nystagmus usually has difficulty visiting things remotely, but should be able to read up close without any difficulty.
involuntary eye movements of the horizontal nystagm eyes may indicate a neurological problem or possibly alcohol or inhaled substances. Some internal ear disorders may cause nystagmus symptoms. Congenital nystagmus usually develops at the age of three months and can be accompanied by other problems. Some cases are caused by poor sight or voltage on the eye muscles. The person under the influence of the central non -depressive rvous system can have involuntary jerky eye movements that are typical of people with horizontal nystagm. The brain is unable to properly control the eye system when it is under the VLIvem such a substance.
Siring nystagmus shows eyes movements in two different ways. Persons affected by acid nystagmus have involuntary eye movements in both directions at the same speed. A person with Jerk nystagmus moves his eyes with a rapid jerky movement on both sides of the head, depending on the direction in which one looks at time, and the second return movement is slower than the first.
The treatment of horizontal nystagm begins with correction of vision. Goggles or contact lenses may be enough to stop symptoms. Some patients may require surgery to change the length of the muscles that control eye movements to correct nystagmus.
The officers can perform a horizontal view of Nystagmus (HGN) to determine whether a person runs during intoxication. A positive test can lead to a person's arrest for deterioration. The test is performed as part of the complete field test (FST).
during the HGN with a test withE will be bright light in front of a person. The person will then be asked to hold the head calmly and follow the light only with the movement of his eyes. Each movement of light through the field of vision of the person will take about four seconds. Any jerked eye movements will be a sign that the officer should continue to test the next field of sobriety.