Nystagmus - causes, symptoms and treatment

Nystagmus is one of the most common eye movement disorders that can have a significant impact on quality of life. This condition is characterised by involuntary, uncontrolled eye movements that can be horizontal, vertical or rotational. Depending on the cause, nystagmus can vary in severity and symptoms can affect a patient's ability to see and function on a daily basis. In this article, we will take a detailed look at what nystagmus is, its causes, symptoms and treatments, and answer the most frequently asked questions related to this disorder.

What is nystagmus?

Nystagmus is the medical term for uncontrolled, rhythmic eye movements that can occur in people of all ages. These movements are most often horizontal, but can also occur in a vertical or rotational direction. Nystagmus can lead to problems maintaining visual acuity, making it difficult for the patient to perform everyday activities such as reading or driving.

This condition can be both congenital and acquired. Congenital nystagmus usually becomes apparent in the first months of a child's life, whereas acquired nystagmus can occur at any age and is often associated with neurological diseases, brain damage or head trauma.

What are the causes of nystagmus?

The causes of nystagmus can be varied and its development is often associated with neurological problems. In children, nystagmus may be the result of congenital eye defects such as albinism, retinal defects or other congenital eye disorders. In adults, nystagmus can be caused by damage to the nervous system, vagus disorders, head injuries or neurological conditions such as multiple sclerosis, brain tumours or stroke.

One of the more common causes of nystagmus is also vestibular disorders, which affect balance and perception of space. These diseases can lead to symptoms such as dizziness and nystagmus. In addition, alcohol abuse, certain medications (e.g. sedatives) and eye diseases such as astigmatism, can also lead to nystagmus.

What are the symptoms of nystagmus?

Symptoms of nystagmus primarily include involuntary eye movements, which the patient may perceive as a "shaking" of the image. Patients may complain of difficulty seeing, eye fatigue and problems focusing their eyes on a specific point. In some cases, nystagmus can cause dizziness and balance problems, which further affects quality of life.

Nystagmus can also cause visual problems such as loss of visual acuity, which is particularly annoying when reading, writing or using a computer. Often people with nystagmus have difficulty in everyday situations that require precise vision, such as driving or working on a computer.

Can nystagmus be treated?

Treatment of nystagmus depends on its cause and the severity of the symptoms. In cases where nystagmus is caused by a neurological disease or visual impairment, treatment should focus on the underlying condition. In some cases, it is possible to alleviate the symptoms of nystagmus with medication, specialised lenses or vision therapy. Prismatic glasses or contact lenses can help to stabilise vision, improving patient comfort.

For patients whose nystagmus is associated with imbalance, vestibular rehabilitation and nystagmus exercises can provide relief. This therapy focuses on improving control of eye movements and strengthening the muscles responsible for eye movements.

In more advanced cases, surgery is possible. This procedure aims to reduce the amplitude of eye movements, leading to improved quality of vision and reduced severity of symptoms. Surgical treatment of nystagmus, such as tenotomy, involves cutting the eye muscles to reduce eye movements.

What are the types of nystagmus?

Nystagmus can be divided into different types depending on its cause and the direction of eye movements. The most common types of nystagmus include:

• Horizontal nystagmus - characterised by horizontal eye movements, from left to right or vice versa.
• Vertical gaze nystagmus - eye movements are directed upwards or downwards.
• Rotational nystagmus - the eyes make rotating movements.
• Congenital nystagmus - occurs from birth and is usually associated with congenital eye defects.
• Acquired nystagmus - occurs as a result of trauma, neurological disease or other external factors.

Each of these types of nystagmus can affect a patient's quality of life in different ways, so appropriate diagnosis and tailored treatment is important.

What tests detect nystagmus?

Diagnosis of nystagmus is key to understanding its cause and selecting appropriate treatment. It includes a detailed ophthalmological examination, including examination of eye movements and visual acuity assessments. In addition, neurological and imaging tests, such as magnetic resonance imaging (MRI) or computed tomography (CT), are often performed to diagnose nystagmus. Through these examinations, brain damage or neurological diseases that may lead to nystagmus can be detected.

In some cases, a vestibular examination, which assesses the functioning of the vestibular and balance system, may also be helpful. This is particularly important when nystagmus occurs in conjunction with dizziness and balance problems.

Nystagmus in children - what to do?

Nystagmus in children is a special challenge for parents and doctors. Congenital nystagmus often becomes apparent in the first months of a child's life and can be caused by genetic defects such as albinism or retinal diseases. Early recognition of the symptoms and consultation with an ophthalmologist or paediatric neurologist to initiate appropriate therapy is crucial.

Treatment of nystagmus in children usually involves wearing special glasses or lenses to help improve visual acuity. Vision rehabilitation can also play an important role in reducing symptoms and improving a child's visual functioning.

Does nystagmus affect driving ability?

Nystagmus can significantly affect the ability to drive, especially in cases where the patient has difficulty maintaining visual acuity. Some people with mild symptoms of nystagmus may still be able to drive, but in more severe cases driving may need to be restricted or stopped altogether. It is important that patients with nystagmus consult their doctor regularly to assess whether they are able to safely participate in traffic.