Eye Twitching (Nystagmus)

Eye twitching is the name given to a condition characterized by uncontrolled, rapid eye movements. A person with this condition may move their eyes from side to side, up and down, or in a circular motion. In some patients, the condition is present from birth, while in others it may develop later. Treatment methods may vary depending on the patient's condition.

What Is Eye Twitching (Nystagmus)?

Nystagmus is known as the twitching of the eyes. The twitching, which can occur in different directions, may also take the form of repeated different movements. For example, the eye may slowly drift to the right and then quickly jump back to its original position, or a pendulum-like movement may be observed. Such twitching of the eye can affect vision, balance and depth perception, and lead to serious problems.

What Are the Types of Eye Twitching (Nystagmus)?

Eye twitching has many subtypes. There are basically 4 different types, but some types are divided into further subcategories. The types of nystagmus are as follows:

Physiological: This type of twitching can be seen in most people and is divided into four: vestibulo-ocular reflex, optokinetic nystagmus, caloric, and post-rotatory. The vestibulo-ocular reflex is the attempt of the eyes to remain steady when the head moves quickly. Optokinetic nystagmus is the involuntary movement of the eyes while looking outside from within a moving vehicle. Caloric eye twitching is the involuntary movement of the eyes that occurs when warm or cold water enters the ear. It occurs when the semicircular canal in the inner ear is stimulated. Post-rotatory nystagmus is the condition in which, after spinning rapidly and then stopping, the eyes still appear to be moving as if still rotating.

Childhood period: This type is usually congenital or appears in childhood. It is divided into five: infantile idiopathic, sensory, latent, spasmus nutans, and monocular nystagmus. The infantile idiopathic subtype is congenital and its cause is unknown. In the sensory type, twitching occurs due to vision problems. Latent nystagmus is when twitching occurs in the other eye when one eye is covered. Spasmus nutans is short-lived twitching of the head and eyes seen in infancy. In the monocular type, as the name suggests, twitching occurs in only one eye.

Acquired (later onset): This type develops later in life due to various causes and is divided into three: gaze-holding defect, peripheral vestibular, and central vestibular. A gaze-holding defect causes the eyes to be unable to remain fixed on a specific point. Peripheral vestibular nystagmus is eye twitching caused by inner ear problems. In inner ear problems, the central subtype may originate from brain-related problems and cause the eyes to drift up and down or perform rotational movements.

Later-developing: Unlike congenital eye twitching, it appears as balanced oscillations. In later-developing eye twitching, involuntary movements may be seen in the eyes, palate, and chewing muscles. At the same time, the eyes may move independently of each other.

What Causes Eye Twitching?

Normally, the brain controls eye movements together with structures in the ear called the vestibular system. During head movement, it automatically adjusts to keep the image seen by the eyes in focus. In patients with nystagmus, however, there is a problem that prevents the brain, the vestibular system, and the eyes from working together. Eye twitching may be a sign of another eye problem, a neurological disorder, or a problem in the inner ear that controls balance and coordination. Possible causes and risk factors of nystagmus are as follows:

Developmental problems in the brain or eye,

Diseases affecting the central nervous system, such as multiple sclerosis (MS),

Retinal or optic nerve disorders,

Stroke,

Brain tumor,

Eye or head injuries,

Alcohol or drug use,

Certain medications, such as antiepileptics,

Inner ear disorders such as benign paroxysmal positional vertigo (crystal displacement in the ear) and Ménière's disease,

Vision problems such as myopia or astigmatism,

Albinism (lack of pigment in the skin),

Eye problems in infants such as strabismus, focusing problems, and cataracts.

Sometimes there is no clear cause for eye twitching. This condition is called idiopathic nystagmus.

What Are the Symptoms of Eye Twitching?

Although nystagmus symptoms vary from person to person, the most common symptom is uncontrolled movement of the eyes. Other symptoms that may occur include:

Balance problems,

Blurred vision,

Dizziness or feeling as if spinning (vertigo),

Sensitivity to light or difficulty seeing in the dark,

Perceiving stationary objects as moving (oscillopsia).

If you have one or more of these symptoms, it is recommended that you see a specialist doctor for an examination. Although eye twitching alone is not harmful, symptoms such as balance problems can lead to falls.

How Is Eye Twitching Diagnosed?

When you visit an eye doctor for eye twitching, your symptoms will be asked about and an eye examination will be performed. If the condition is related to the ear or brain, neurologists or ENT (ear, nose and throat) doctors may also make the diagnosis. Tests that may be performed to diagnose eye twitching include:

Ear examination,

Neurological examination,

Computed tomography,

MRI,

Genetic tests,

Eye movement recording.

How Is Eye Twitching Treated?

Nystagmus treatment involves eliminating the condition causing the disease. In some patients, treating the underlying disease can correct acquired eye twitching. For example, if an inner ear disorder is causing the condition, treating it may also eliminate the eye twitching. Some subtypes of congenital nystagmus may resolve in later years. Other types cannot be completely cured, but symptoms may be reduced with appropriate treatment. Your doctor may wish to apply the following treatment methods, suited to your type of eye twitching:

Glasses or contact lenses: Clearer vision may help slow eye movements. For this reason, your doctor may recommend glasses or lenses. Some patients may need prism lenses that restrict movement.

Medications: Your doctor may prescribe medications such as antiepileptics and muscle relaxants.

Strabismus surgery: Although rare, this surgery may be performed. During the surgery, the muscles that move your eyes are repositioned. The surgery does not completely cure the condition, but it can help reduce eye movements.

Laser: It may be used in patients with nystagmus who also have vision problems such as myopia. Since this improves your vision, it can reduce nystagmus symptoms.

Frequently Asked Questions About Eye Twitching

Depending on the cause of the disease, it can be resolved with different treatment methods. If the underlying cause cannot be treated, measures aimed at reducing symptoms may be applied. In persistent eye twitching, medications may be prescribed, but in some patients medication may also be ineffective. Eye twitching may result from inner ear problems. Brain-related problems, such as multiple sclerosis, may also cause it. It may also be a congenital condition. Spontaneous eye twitching is the involuntary twitching of the eyes on their own, without any external influence. The eyes move from side to side for no apparent reason (horizontal nystagmus), or up and down or in circular movements (vertical nystagmus). This condition is not dangerous by itself, but it can become dangerous as it may cause problems such as falls. Depending on the cause, eye twitching may resolve on its own. Eye twitching examination involves a specialist eye doctor examining eye movements. Your doctor observes involuntary movements by asking you to look in different directions. They may ask you to follow an object such as a pen or a light source. Single-eye twitching usually occurs in childhood and is observed due to problems in the eye or nervous system. Factors that may cause single-eye twitching include:

Vision problem: Having an eye problem for a long time, such as lazy eye (amblyopia), may lead to problems in one eye.

Brain tumor: Tumors that put pressure on the nerves in a child's brain may cause eye twitching. This is a serious condition, and it is recommended that the child be under constant medical supervision.

Optic nerve problem: Conditions such as damage to the optic nerve may also cause twitching in one eye.

During the eye twitching test, special goggles are worn and you sit in a dark examination room. The goggles contain cameras that record eye movements. Your doctor will ask you to follow moving lights on a screen or to move your head in certain ways. Your eyes' responses during this time are recorded.

By learning how to manage eye twitching, you can carry on with your daily life more easily. Choosing a large font when reading a book or looking at a phone screen will help you read more comfortably. Also, using more light in your surroundings may positively affect your vision. If your child has this condition, you can talk with their school and make changes that will allow them to read text more easily in class. In addition, large, brightly colored toys will attract your child's interest, and these toys are easier to use. Toys that make sounds or allow them to experience different textures may also be preferred.