Are you deaf in one ear? (Unilateral Hearing Loss) - Let's talk about this.

Do you sometimes have to turn your head in the direction of someone when they are talking? Or do you always have the phone in one ear when you get a call? Do you find it difficult to understand a conversation in a crowded place? Most of the time, we don't pay much attention to things like this. But this can be a sign of a gradual loss of hearing in one ear. In medicine, we call this 'Unilateral Hearing Loss'. Simply put, hearing loss on one side. Today we are talking about this condition that many people have, but don't pay much attention to.

What is Unilateral Hearing Loss?

Simply put, 'Unilateral Hearing Loss' is when you have some hearing loss in only one of your ears. You may hear perfectly well in the other ear. But when hearing is reduced in one ear, it has a big impact on our lives.

Think of it this way: our ears are like two speakers in a stereo sound system. If one speaker stops working, the whole sound of a song will be lost. When one ear is not working properly, there are two main things that affect us:

1. Difficulty locating the direction of sound: It is difficult to pinpoint the exact direction of sounds such as the sound of a vehicle approaching or someone speaking.

2. Difficulty understanding speech in crowded places: When there is a lot of noise around (for example, in a restaurant, on a bus), it becomes difficult to distinguish and understand what someone is saying.

This hearing loss can be mild, moderate, or severe . Some people may not hear at all in one ear. This is called 'Single-Sided Deafness'. This condition can be present at birth, develop gradually over time, or come on suddenly. The good news is that this condition can be largely relieved with treatments such as hearing aids and cochlear implants.

What are the symptoms of this?

Often, the symptoms of hearing loss in one ear are similar to those of hearing loss in both ears. However, some things are especially relevant to this condition. Let's take a look at what these symptoms are.

What could be causing this?

It's actually difficult to pinpoint the exact cause of hearing loss in just one ear. But there are a few common causes. These causes can vary between adults and children.

• Exposure to loud noise: Prolonged exposure to loud noise coming from one side (e.g., a gunshot, the sound of a machine).
• Head injuries: A blow to the head, especially to the ear. We call this a Traumatic Brain Injury (TBI) .
• Infections: Various bacterial or viral infections that occur in the ear.
• Genetic causes: Some hereditary conditions, such as Neurofibromatosis Type 2, can cause acoustic neuromas .
• Other medical conditions: Diseases that affect the inner ear, such as Meniere's disease.

Why is it difficult to find the direction of sound (localized hearing)?

This is the biggest practical problem that arises in this situation. Let's understand this with a simple example.

Imagine you're walking on a busy road like in Colombo. Suddenly, a three-wheeler speeds by on your left and honks its horn.

• For someone with good hearing: Your left ear hears the horn first, and it's a little louder. Your right ear hears it a moment later, and it's a little quieter. This is because your head is blocking the sound waves from reaching your right ear, like a 'shadow'. Your brain instantly analyzes the information coming from these two ears (the difference in time of hearing and the difference in volume) and tells you, "Oh... the horn honked from the left."

• For someone who can't hear in their left ear: Now imagine that your left ear can't hear properly. You can only hear the sound of a three-wheeler's horn in your right ear. The brain has no way of comparing the information coming from both ears. So it can't pinpoint where the sound is coming from. You look left and right. This can be very dangerous when you're crossing the street.

This is what we call 'localized hearing', or the ability to identify the location of sounds. This ability is most affected when hearing loss occurs in one ear.

How is this condition diagnosed and treated?

If you have these symptoms, the first thing to do is see a doctor .

Diagnosis

1. Medical examination: The doctor will ask you about your symptoms and examine your ear. He will check for earwax, infection, etc.

2. Scans: If you have had an accident or if there is a suspicion of something like a tumor in the ear, you may be asked to have a CT scan or MRI .

3. Hearing tests: You will then be referred to an audiologist, who will perform various hearing tests to determine the exact level and type of hearing loss.

Treatment methods

Treatment depends on the cause and severity of your hearing loss. There are various technologies and methods available.

Can this situation be prevented?

We can't prevent some causes (like genetics), but there are many things we can do to reduce the risk of other causes. One of them is to protect our hearing in both ears.

• Protect yourself from loud noises: Use earplugs or earmuffs in places with loud noises, such as at music concerts, working with machinery, and riding motorcycles.
• Limit headphone use: When listening to music or talking on headphones or earphones, practice listening at a lower volume. A good rule of thumb is to not listen at more than 80% of the maximum volume for more than 90 minutes a day.
• Do not put anything in your ear: Do not put anything in your ear, such as cotton swabs or hairpins. These can get stuck in your ear or damage your eardrum.
• Avoid smoking: Smoking can interfere with blood circulation and affect hearing.
• Healthy lifestyle: Diseases like diabetes and high blood pressure can also affect hearing. So, protect yourself from these diseases by exercising regularly and eating a balanced diet.

How to live with this situation?

Treatment can improve your hearing significantly. But there may still be challenges. In such cases, it is important to let your family, friends, and coworkers know that you have this condition. This will help them understand why you can't hear certain things.

This situation can cause some people to experience depression, anxiety , and social isolation . If you are feeling this way, consider seeking mental health counseling . It can provide you with great relief.