Blepharospasm

Blepharospasm is an uncommon condition that causes involuntary spasms or twitching of your eyelids, usually affecting both eyes. These spasms can range from mild, increased blinking to forceful eyelid closure, sometimes making it difficult to see and leading to temporary functional blindness. It is a type of movement disorder.

What is Blepharospasm?

Blepharospasm is a type of focal dystonia, a neurological movement disorder that causes involuntary and repetitive muscle contractions in a specific body part. In this condition, the muscles around your eyes spasm uncontrollably, leading to increased blinking or forceful eyelid closure. It typically affects both eyes.

This condition is characterized by uncontrolled blinking or twitching of the eyelids. It is considered a form of dystonia, which means there is a problem with the brain's signals that tell muscles how to move. In blepharospasm, these signals cause the eyelid muscles to contract without you wanting them to. While the spasms usually affect both eyes, they can vary in intensity. For some people, it might be an annoying increase in blinking, but for others, the spasms can become so severe that they cause the eyelids to close completely for periods. This forceful closure can temporarily impair vision, making it difficult to perform daily activities like reading or driving, a condition sometimes referred to as functional blindness.

Symptoms

Symptoms of blepharospasm often begin gradually with increased blinking, eye irritation, or sensitivity to light (photophobia). Over time, these symptoms can progress to more forceful and frequent eyelid spasms, leading to involuntary eyelid closure that can last from seconds to hours.

The earliest signs of blepharospasm are usually subtle. You might notice your eyes blinking more often than usual, or you may feel a persistent irritation in your eyes, even if there's no obvious cause. Many people also experience increased sensitivity to bright light, a symptom known as photophobia. As the condition progresses, the spasms become more noticeable and intense. Your eyelids might close forcefully and uncontrollably, making it hard to keep your eyes open. These spasms can be triggered or worsened by factors like stress, fatigue, or exposure to bright lights. Interestingly, the spasms usually stop when you are asleep but can resume shortly after waking.

Causes & risk factors

The exact cause of blepharospasm is often unknown, a condition called idiopathic blepharospasm, but it is thought to involve problems with the basal ganglia, a part of the brain controlling movement. Risk factors include being female and typically starting between the ages of 50 and 70.

In most cases, the cause of blepharospasm cannot be identified, which is why it's often referred to as idiopathic (meaning of unknown cause) essential blepharospasm. Researchers believe it may be related to abnormal functioning in the basal ganglia, a deep part of the brain that plays a key role in controlling voluntary movements. Sometimes, blepharospasm can be secondary, meaning it's caused by another underlying condition or factor. These can include eye irritation from dry eyes, inflammation of the eyelids (blepharitis), or other neurological disorders like Parkinson's disease or Tourette's syndrome. Certain medications can also sometimes trigger similar symptoms. While anyone can develop blepharospasm, it is more common in women than in men. The condition typically begins in middle to late adulthood, usually between the ages of 50 and 70. A family history of dystonia may also increase your risk, suggesting a genetic component in some cases.

How it's diagnosed

Blepharospasm is diagnosed by a doctor, usually a neurologist or ophthalmologist, based on your symptoms and a physical and neurological examination. There isn't a specific test to confirm blepharospasm; instead, diagnosis involves ruling out other conditions that might cause similar eye twitching or spasms.

When you see a doctor for symptoms like persistent eye twitching or involuntary blinking, they will typically start by asking about your medical history and performing a thorough physical examination. This includes a neurological exam to assess your reflexes, muscle strength, and coordination, and an eye exam to check for any other eye conditions. Since no single test can definitively diagnose blepharospasm, the diagnostic process often involves ruling out other potential causes. Your doctor will consider conditions such as dry eyes, allergies, or side effects from certain medications that can mimic blepharospasm symptoms. This careful evaluation helps ensure an accurate diagnosis and appropriate treatment plan.

Treatment options

The most effective and common treatment for blepharospasm involves injections of botulinum toxin (Botox) into the muscles around the eyes. These injections temporarily relax the muscles, reducing spasms. Other options include oral medications, and in severe cases, surgery may be considered.

Botulinum toxin injections are considered the primary treatment for blepharospasm. A small amount of the toxin is injected into several points around the eyelids, causing the muscles to weaken and relax. This typically reduces the frequency and severity of spasms for about three to four months, after which repeat injections are needed to maintain the effect. Oral medications, such as muscle relaxants or sedatives, are sometimes prescribed. However, these medications often provide only limited or temporary relief for blepharospasm symptoms and may come with side effects. They are generally less effective than botulinum toxin injections. For people with severe blepharospasm who do not respond well to botulinum toxin injections, a surgical procedure called a myectomy may be an option. This surgery involves removing some of the muscles responsible for eyelid closure. Additionally, lifestyle adjustments like wearing sunglasses to reduce light sensitivity, getting adequate rest, and managing stress can help reduce triggers and improve comfort.

Recovery & outlook

Blepharospasm is a chronic (long-lasting) condition, meaning it cannot be cured, but its symptoms can be effectively managed for most people. With regular treatment, particularly botulinum toxin injections, many individuals can significantly reduce their spasms and improve their quality of life.

While there is no cure for blepharospasm, the outlook for managing its symptoms is generally positive with appropriate treatment. Botulinum toxin injections are highly effective for the majority of people, providing significant relief from involuntary eyelid spasms. However, because the effects of the injections are temporary, ongoing treatment every few months is necessary. Living with a chronic condition like blepharospasm can be challenging, but effective management allows many people to maintain their daily activities and independence. It's important to work closely with your healthcare team to find the most suitable treatment plan and to adjust it as needed over time. Regular follow-ups help monitor the condition and ensure continued symptom control.

When to see a doctor

You should see a doctor if you experience persistent or worsening eye twitching, involuntary eyelid spasms, or any changes in your vision. Early evaluation can help determine the cause of your symptoms and ensure you receive an accurate diagnosis and appropriate treatment plan.

It's important to seek medical attention if you notice any new or concerning eye symptoms. Specifically, if you have eye twitching that lasts for more than a few days or weeks, or if your eyelid spasms become more frequent, forceful, or interfere with your ability to see or perform daily tasks, you should consult a healthcare professional. Additionally, if you experience other symptoms alongside your eye spasms, such as vision changes, eye pain, redness, or discharge, these could indicate a different underlying condition that requires prompt medical evaluation. A doctor can properly assess your symptoms, rule out other causes, and discuss the best course of action for your specific situation.

Frequently asked questions

Is blepharospasm a serious condition?

Blepharospasm is generally not life-threatening, but it can significantly impact your quality of life. The involuntary eyelid closure can make it difficult to see, interfering with daily activities like driving, reading, or working. While it's a chronic condition, treatments are available to manage the symptoms effectively.

Can stress make blepharospasm worse?

Yes, stress is a common trigger that can worsen blepharospasm symptoms. Many people find that their eyelid spasms become more frequent or intense during periods of high stress, fatigue, or anxiety. Managing stress through relaxation techniques or lifestyle changes may help reduce the severity of spasms.

Is blepharospasm the same as an eye twitch?

While blepharospasm involves eye twitching, it is typically more severe and persistent than a common, temporary eye twitch (myokymia). A typical eye twitch is usually mild, affects only one eye, and resolves on its own. Blepharospasm often affects both eyes, involves more forceful spasms, and is a chronic neurological condition requiring medical treatment.

Are there any home remedies for blepharospasm?

There are no specific home remedies that cure blepharospasm, but some self-care strategies can help manage symptoms. These include wearing sunglasses to reduce light sensitivity, getting adequate rest, avoiding triggers like bright lights or caffeine, and practicing stress-reduction techniques. These methods can complement medical treatments but should not replace them.

How long do botulinum toxin injections last for blepharospasm?

Botulinum toxin injections typically provide relief from blepharospasm symptoms for about three to four months. After this period, the effects gradually wear off, and the spasms may return. To maintain symptom control, repeat injections are usually necessary on a regular schedule determined by your doctor.

Can blepharospasm lead to blindness?

Blepharospasm does not cause permanent damage to your vision or lead to actual blindness in the sense of losing your eyesight. However, the forceful and involuntary closure of the eyelids can temporarily prevent you from seeing, which is sometimes referred to as 'functional blindness' because it impairs your ability to see while the spasms are occurring.

Sources

• MedlinePlus — Blepharospasm
• Mayo Clinic — Blepharospasm
• Cochrane Library — Blepharospasm