Is my eye problem an emergency?

If you are experiencing pain, changes in vision, flashes, floaters, or any injury to the eye, it is important not to ignore it. Some eye conditions can worsen quickly, and early assessment can make a significant difference. If you are unsure, it is always safer to have your eyes checked.

Can you see me urgently?

We understand that eye problems can be worrying, especially when symptoms develop suddenly. We do our best to offer urgent appointments so your symptoms can be assessed as quickly as possible.

What should I do if I have something in my eye?

Avoid rubbing or trying to remove it yourself, as this can cause further damage to the surface of the eye. We can examine your eye safely and remove any foreign material if needed.

Are flashes and floaters something to worry about?

Flashes and floaters are common and often harmless, but new or sudden symptoms should always be assessed. In some cases, they can be early signs of a retinal problem that needs prompt treatment.

What happens if I wait too long?

Some eye conditions can progress quickly and affect your vision if left untreated. While not all symptoms are serious, delaying assessment can increase the risk of complications. If something does not feel right, it is always better to have your eyes checked.

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Tear Biomarkers

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Looking Beyond Symptoms to Discover What's Driving Your Dry Eye

Have you been told you have dry eye, yet still don't feel you fully understand why your eyes are uncomfortable? Have you tried different treatments with little improvement, or wondered whether inflammation, allergy or another underlying problem could be causing your symptoms?

Dry eye disease is far more complex than simply having a lack of tears. Two people may experience exactly the same symptoms, yet the underlying causes can be completely different. Without understanding what is driving your condition, treatment can become a process of trial and error rather than being tailored to your individual needs.

At Eye Clinic London, Tear Biomarker Testing adds another important layer to our comprehensive dry eye assessment. By analysing naturally occurring proteins within your tears, it helps us understand the biological processes behind your symptoms and supports a more personalised treatment plan.

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Why Is Tear Biomarker Testing Important?

Think of it as adding another piece to the puzzle.

While your symptoms, examination and advanced imaging tell us how your eyes look, tear biomarkers help us understand what is happening at a molecular level.

Tear Biomarker Testing can help us:

Identify active ocular surface inflammation
Differentiate between different types of dry eye disease
Detect allergy that may mimic or coexist with dry eye
Guide more personalised treatment selection
Monitor how your eyes respond to treatment over time

Rather than treating every patient in the same way, we can make decisions based on a more complete understanding of your eyes.

Looking Beneath the Surface of Your Dry Eye

Every tear biomarker tells us something different about the health of your eyes. Rather than relying on a single test, we can measure different biological processes that may be contributing to your symptoms.

Together, these biomarkers help us build a more complete understanding of your dry eye disease and guide a more personalised treatment plan.

Biomarker	What does it tell us?
MMP-9	Is inflammation damaging the surface of your eye?
LTA	What biological process is driving your dry eye?
IgE	Is allergy contributing to your symptoms?

No single biomarker provides all the answers, but together they help us move beyond treating symptoms alone and towards understanding the underlying cause of your dry eye.

The Three Biomarkers We Test

Every patient's dry eye is different. Depending on your symptoms and examination findings, we may recommend one or more tear biomarker tests as part of your assessment.

MMP-9 – Measuring Ocular Surface Inflammation

The MMP-9 test helps us identify:

Elevated levels of Matrix Metalloproteinase-9 (MMP-9), a naturally occurring inflammatory protein.
Whether inflammation is affecting the surface of your eye.
Whether the corneal epithelial barrier – the eye's natural protective surface – has become damaged.
Whether inflammation is contributing to your symptoms, even when your eyes appear relatively normal during a routine examination.

Why is this important?

Inflammation is one of the main drivers of dry eye disease. If left untreated, it can continue to damage the ocular surface, reduce tear film stability and make symptoms more persistent. By identifying inflammation early, we can treat the underlying disease rather than simply managing the symptoms.

This information helps us to:

Personalise your treatment plan
Decide whether anti-inflammatory treatment is appropriate
Monitor your response to treatment over time
Optimise the ocular surface before cataract or laser vision correction surgery

LTA – Understanding Your Type of Dry Eye

The LTA test helps us identify whether your dry eye is caused by:

Goblet cell (mucin) deficiency, where the eye produces less of the protective mucin layer that helps tears spread evenly across the surface of the eye, making the tear film less stable and allowing the eyes to dry out more quickly.
T-cell activation, where the body's immune system becomes overactive and continues to trigger inflammation and irritation of the ocular surface.
A combination of both processes, which is common in more complex dry eye disease.

Why is this important?

Different biological causes can produce very similar symptoms, but they often require different treatments. Understanding the underlying mechanism helps us choose treatments that are better matched to your individual condition.

This information helps us to:

Personalise your treatment plan
Select therapies that target the underlying cause
Avoid treatments that may be less effective
Monitor your improvement over time

IgE – Is It Dry Eye, Allergy or Both?

The IgE test helps us identify:

Elevated levels of Immunoglobulin E (IgE), an antibody produced by the immune system in response to allergens such as pollen, dust mites, animal dander or mould.
Whether an allergic response is contributing to inflammation of the ocular surface and your symptoms.
Whether allergy and dry eye are occurring together, which is more common than many people realise and often makes symptoms more difficult to control.

Why is this important?

Dry eye disease and allergic eye disease often cause similar symptoms, including redness, watering, irritation and itching, but they require different treatments. Identifying allergy allows us to treat both conditions appropriately and improve the accuracy of your diagnosis.

This information helps us to:

Personalise your treatment plan
Select the most appropriate treatment
Avoid unnecessary or ineffective medication
Improve long-term symptom control

Pricing

Tear Biomarker Testing

^£50 per biomarker test

Following your examination, your consultant will recommend only the biomarker tests that are most relevant to your condition.

What Happens During Tear Biomarker Testing?

At Eye Clinic London, Tear Biomarker Testing is performed using the SEINDA i-IMMUNODX® point-of-care diagnostic platform, providing rapid results during your consultation.

The test is quick, comfortable and performed during your consultation.

What to expect:

A tiny sample of your natural tears is collected from the surface of your eye.
The sample is analysed using advanced point-of-care technology.
No injections, blood tests or special preparation are required.
Results are available during your appointment.
Your consultant will explain the findings and discuss how they may influence your personalised treatment plan.

Understanding Your Dry Eye from Every Angle

No single test can explain every patient's symptoms.
At Eye Clinic London, we combine three complementary diagnostic approaches to understand not only what we can see, but also what is happening beneath the surface.

What we can see

C.Diag Advanced Dry Eye

Diagnostics

Assessing:

Tear film quality
Meibomian glands
Blink dynamics
Ocular surface health

What is happening biologically

Tear Biomarker Testing

Performed using the SEINDA i-IMMUNODX® diagnostic platform.

Measuring:

Inflammation (MMP-9)
The biological mechanism driving your dry eye (LTA)
Allergy (IgE)

How your corneal nerves are functioning

BRILL Corneal Sensitivity Testing

Assessing:

Corneal nerve health
Corneal sensitivity
Neuropathic eye pain

Bringing Everything Together

By combining:

Structural imaging (C.Diag)
Molecular diagnostics- tear biomarkers (SEINDA i-IMMUNODX®)
Functional nerve assessment (BRILL)

we can develop a far more complete understanding of your dry eye than any single test can provide.

The result is a more accurate diagnosis, a more personalised treatment plan and, ultimately, a better chance of long-term symptom relief.

Why Choose Eye Clinic London?

You deserve more than a diagnosis of "dry eye."

Our advanced diagnostic approach helps us move beyond symptoms alone, giving you the best opportunity for a more accurate diagnosis and personalised treatment.

Take the Next Step

Stop guessing what's causing your symptoms.

Book your comprehensive dry eye assessment today and let us discover what's really driving your dry eye, so we can recommend the treatment that's right for you.

Finance & Insurance

Accessible top-tier eye treatment is our promise. Explore our adaptable payment options and let our team manage the finances while you focus on your health. Don’t hesitate to contact us for extra information.

Our Location

Strategically located in Devonshire Street, Harley Medical District, Marylebone, in the heart of London, our clinic is easily accessible, ensuring that your journey to exceptional eye care is as convenient as possible. Our central position ensures that you can easily reach us from various parts of the city.

Devonshire street in Marylebone is not just an address; it’s a hub of convenience and accessibility. With excellent transport links and a wealth of amenities nearby, your visit to Eye Clinic London will be convenient and hassle-free experience.

Whether you are a local resident or visiting form other parts of UK or abroad, our location will provide you with seamless connection to the private eye doctor in London.

When choosing to travel by public transport please alight at Bond Street Station and walk for 7 mins, alternatively exit at Oxford Circus station or Baker Street Station and walk for 10 mins.

Street parking is available.

Eye Clinic London 7 Devonshire Street
London, W1W 5DY

The McIndoe Centre Holtye Road East
Grinstead RH19 3EB