Have you ever noticed that some children have difficulty turning their eyes in the same direction? Or it looks like one eye is turned towards the nose and the other eye is turned towards the ear. It is normal for parents to feel very worried when they see something like this, especially when it happens to their child. Duane Syndrome, which we are going to talk about today, is a congenital condition that occurs with the movement of the eyes. Simply put, this is a type of strabismus.
What is Duane Syndrome? Can you explain it a little more?
Okay, let's explain this a little more simply. A person with Duane Syndrome has difficulty turning their eyes to the side, that is, to the side of the nose and to the side of the ear. It may be one eye, it may be both eyes. In addition to the difficulty in turning these eyes to the side, some people may also have difficulty looking up and down.
Another thing is that the eyes do not match each other, they look sideways, and even the eyeballs can move differently when trying to move the eyes. The main reason for this is that the nerves (cranial nerves) that control the muscles in our eyes do not work properly. Imagine, it is like not being able to turn the steering wheel of a car in either direction.
In most cases, between 80% and 90%, this condition affects only one eye (unilateral). It has also been found that the left eye is more commonly affected .
Are there other names for this?
Yes, there are several other names used for Duane Syndrome. Don't worry if your doctor says one of these names, they are all the same condition.
- Duane retraction syndrome
- Eye retraction syndrome
- Retraction syndrome or congenital retraction syndrome
- Duane radial ray syndrome
- Stilling-Turk-Duane syndrome
It's good to know these names, because sometimes these names may appear in medical records.
Are there types of Duane Syndrome?
Yes, just like we're talking about foods, there are three main types of Duane syndrome. They're called type 1, type 2, and type 3. Let's now look at each type separately.
Type 1 Duane syndrome
This is the most common type , accounting for 78% of all Duane syndrome patients.
If you or your child has the first type, it is difficult to turn the eye outward, that is, towards the ear . But you can turn the eye towards the nose. However, when you do so, the eye opening becomes smaller and the eyeball may appear to ``retract''. Sometimes the eye may also appear to be pulled towards the nose (esotropia).
Type 2 Duane syndrome
This is the least common type , accounting for about 7% of people with the condition.
A person with the second type has a limited ability to turn the eyes inward, that is, towards the nose . However, they can turn the eyes towards the ear. However, when they do so, the eye opening becomes smaller, as in the first type, and the eyeball may appear to be going inward. These people may have their eyes turned outward, towards the ear (exotropia).
Type 3 Duane syndrome
This type affects about 15% of all patients.
A person with type 3 has limited ability to turn their eyes in both directions, inward and outward . Also, when viewed from different angles, the eye socket may appear to be narrowed and the eyeball may appear to be going inward.
This classification is important for doctors to plan treatment and understand the nature of the disease.
How common is Duane Syndrome?
According to statistics in the United States, about 4% of the population, or about 13 million people, have some form of strabismus. It is estimated that between 1% and 5% of those with this condition have Duane syndrome.
Another thing is that this condition is slightly more common among women .
What are the symptoms of this? Do young children also see these?
Yes, some of the symptoms of Duane syndrome can be seen even in young babies. Let's see what the main symptoms are:
- Abnormal head tilt: Some people with Duane syndrome tend to tilt their heads to one side in an attempt to keep their eyes straight. Think of it like tilting your head when you look at a picture hanging on the wall.
- Strabismus: Sometimes, but not always, it appears that both eyes are not pointing in the same direction .
- Amblyopia or lazy eye: This is also called "lazy eye." As the brain gets used to the better eye, it begins to ignore the signals from the affected eye. This can lead to poor vision in that eye over time.
- One eye appearing smaller than the other: This is due to the narrowing of the eyeball.
- Moving the eyes up or down when looking in a certain direction: This is called ``up-shooting'' or ``down-shooting''. It can look like the eyes are suddenly jumping up or down.
If you see these symptoms in your child, it is very important to definitely see an ophthalmologist for advice.
Can people with Duane Syndrome develop other medical conditions?
Although not always, Duane syndrome can sometimes be accompanied by other health problems. Some of these include:
- Hearing disorders
- Goldenhar syndrome: This is a condition that causes abnormalities of the face, ears, and spine.
- Problems with your spine or vertebrae
In addition, other eye conditions can occur along with Duane syndrome. For example:
- Cataract: This means clouding of the lens of the eye.
- Microphthalmos: In this case, the eye becomes abnormally small.
- Nystagmus: This is when the eyes move rapidly and uncontrollably.
- Crocodile tears syndrome: This is related to a facial nerve dysfunction condition called Bell's palsy. In this condition, tears appear when eating or drinking something.
Therefore, when Duane syndrome is diagnosed, doctors also check for other similar conditions.
What are the causes of Duane Syndrome?
Duane syndrome is a genetic condition, but it is not usually inherited . These eye movement problems are caused, as mentioned earlier, by problems with the cranial nerves that control the movement of our eyes.
In particular, it has been found that children of mothers exposed to the drug thalidomide during pregnancy are slightly more likely to develop Duane syndrome (the drug is no longer used for this purpose).
About 10% of people with Duane syndrome have other family members who also have the condition. In such familial cases, both eyes are usually affected (bilaterally).
If Duane syndrome is inherited, it is caused by a child inheriting a variant of the genes `CHN1`, `MAFB`, or `SALL4` from their parents. This pattern of inheritance is called `autosomal dominant` . This means that it can occur regardless of gender, and even if only one parent has the condition, the child can inherit it.
Is Duane Syndrome contagious?
No, not at all. Duane syndrome is not a contagious disease. That is, it is not spread from one person to another like a cold or a flu. So there is no reason to be afraid of it.
How is Duane Syndrome diagnosed?
Your doctor, especially an ophthalmologist, will take a complete medical history and examine your eyes carefully. They will measure how much water is in your eyes and how far you can turn them from side to side.
The doctor may also order tests to check for other conditions that may be associated with Duane syndrome.
There is another condition called sixth cranial nerve palsy, which is very similar to Duane syndrome, but is not as common. The doctor will also try to distinguish between these two conditions.
How is Duane Syndrome treated?
Treatment options depend on your age, the severity of the disease, and any other medical conditions you may have.
- Some people may not need treatment: Some people with Duane syndrome do not need any special treatment. They just need to continue seeing an eye doctor and having their eyes checked.
- Treatment for Lazy Eye (Amblyopia): If you also have a lazy eye, you can try to improve the vision of that eye by covering the good eye with a patch and making the weak eye work harder. This is like asking a bright child in class to stand aside for a while and giving the other child a chance.
- Surgery: If Duane syndrome is severe, surgery may be required to repair the eye muscles. This surgery cannot fix the nerve problem, but it can help realign the eye muscles, reduce abnormal head tilts, keep the eyes straight when looking straight ahead, and control up-shoots/down-shoots.
Remember, not everyone needs surgery. That's up to your doctor to decide.
Can Duane Syndrome be prevented?
At this time, there is no way to prevent Duane syndrome. The drug thalidomide, which can cause Duane syndrome (among many other birth defects), is no longer used. So there is no need to be afraid of it.
If I have Duane Syndrome, what should I expect?
Some people with Duane syndrome can turn their heads slightly, improve their vision, and live a normal life. In some cases, surgery may be necessary, as mentioned earlier.
If you have another condition along with Duane syndrome, your doctor will treat that condition as well.
You may also be recommended to wear glasses to improve vision and/or correct the position of your eyes.
What questions should I ask my doctor?
You can ask your doctor questions like these:
- Should I see a genetic counselor? (Especially if someone in the family has this condition, or if I am expecting more children).
- Are there any assistive devices that help with vision?
A doctor will usually diagnose a child with Duane syndrome within the first 10 years of life. If you have any concerns about your vision or your child's vision, see a doctor right away. Your doctor can help you decide the best treatment for Duane syndrome and treat amblyopia if it is present.
Finally, things to remember (Take-Home Message)
Okay, so, to summarize the Duane Syndrome we've been talking about, remember these things:
- Duane syndrome is a congenital condition that makes it difficult to turn the eyes from side to side.
- This is not a contagious disease.
- Symptoms include turning the head to one side, squinting, and decreased vision in one eye.
- There are three types of this, and it can sometimes occur with other health problems.
- Treatment may include observation, patching the lazy eye, or surgery. Not everyone needs surgery.
- The most important thing is that if you or your child has these symptoms, do not panic and see an ophthalmologist for proper advice and treatment.
I hope this information is helpful to you. If you have any further questions, don't hesitate to ask your doctor!
Duane syndrome, strabismus, congenital eye condition, eye movement, lazy eye, amblyopia, vision problems
💬 අදහස් (0)
තවමත් කිසිදු අදහසක් පළ කර නොමැත. ඔබේ අදහස පළමු වරට මෙහි එක් කරන්න.
ඔබේ අදහස එක් කරන්න