What Are the Common Symptoms of Dry Eye Disease?

If your eyes constantly feel irritated, tired or watery, you're not alone. Dry eye disease is one of the most common conditions we see at The Dry Eye Suite, yet many people have been struggling with symptoms for months—or even years—before they realise dry eye is the cause.

One of the biggest misconceptions about dry eye is that it simply means your eyes don't produce enough tears. In reality, most people we assess produce plenty of tears. The problem is that those tears aren't stable enough to keep the surface of the eye healthy.

In our clinic, we commonly see patients who have been told they have "dry eye" when the underlying cause is actually untreated Meibomian Gland Dysfunction (MGD). Identifying why your eyes are dry is just as important as recognising the symptoms themselves, because different causes require different treatments.

1. Burning or Stinging Eyes

A burning sensation is one of the most common complaints we hear from patients.

Many describe it as feeling like shampoo has got into their eyes or as though their eyes are constantly irritated.

This happens because the protective tear film becomes unstable, leaving the surface of the eye exposed. As the tears evaporate, the cornea and conjunctiva become irritated and inflamed, leading to burning, stinging and discomfort.

Some patients notice this all day, while others find it becomes progressively worse as the day goes on.

2. A Gritty or Sandy Feeling

People often tell us:

"It feels like there's something in my eye."

Despite this sensation, there's usually nothing trapped under the eyelid.

Instead, inflammation and an unstable tear film create the feeling of grit or sand moving across the surface of the eye every time you blink.

If you've been repeatedly checking your eye in the mirror but can't see anything, dry eye could be the explanation.

3. Watery Eyes

This surprises almost every patient.

One of the most common symptoms of dry eye isn't dryness at all—it's watery eyes.

When the eye becomes irritated, it responds by producing a sudden rush of reflex tears.

The problem is that these tears are mostly water. They don't contain enough oil to remain on the eye, so they quickly overflow onto your cheeks without solving the underlying problem.

In fact, many of our patients come to us convinced they can't have dry eye because their eyes water constantly.

Read more: Why Are My Eyes Watering All the Time?

4. Blurred or Fluctuating Vision

If your vision becomes blurry but improves after blinking, the tear film is often responsible.

The tear film is actually the first optical surface of the eye. If it becomes uneven, light no longer focuses consistently, causing vision to fluctuate.

Patients frequently tell us they think they need stronger glasses, when in reality their prescription hasn't changed—the quality of their tear film has.

This is particularly noticeable when reading, working on a computer or driving.

5. Red Eyes

Persistent redness is another common symptom.

Inflammation on the surface of the eye causes the tiny blood vessels within the conjunctiva to become more prominent.

Many people assume they simply have "sensitive eyes," but chronic redness should always be investigated rather than ignored.

6. Light Sensitivity

When the tear film isn't protecting the eye properly, everyday light can suddenly feel uncomfortable.

Patients often report:

• Bright sunlight feels harsher than it used to.

• Car headlights become difficult to tolerate.

• They instinctively wear sunglasses more often.

Although light sensitivity can have many causes, dry eye is one of the more common ones.

7. Tired, Heavy Eyes

One symptom that isn't discussed enough is simply feeling that your eyes are exhausted.

Many people describe their eyes as:

• Heavy

• Fatigued

• Aching

• Difficult to keep open

This is especially common after several hours of screen use.

We blink much less when using computers or phones, meaning the tear film isn't replenished as often and evaporates more quickly.

8. Contact Lenses Becoming Uncomfortable

If you've happily worn contact lenses for years but suddenly struggle to tolerate them, dry eye may be the reason.

As the tear film becomes less stable, contact lenses dry out more quickly and can feel uncomfortable long before the end of the day.

Sometimes people assume they've "grown out of" wearing contact lenses, when the real issue is an underlying ocular surface problem.

9. Sticky or Stringy Mucus

Some patients notice sticky mucus collecting in the corners of their eyes or stringy mucus when they wake in the morning.

This is another sign that the tear film has become unbalanced and the ocular surface is inflamed.

10. Difficulty Keeping Your Eyes Open

In more severe cases, patients tell us they simply want to close their eyes because it feels more comfortable.

Wind, air conditioning, heating or even walking outdoors on a cold day can become surprisingly uncomfortable.

Closing the eyes temporarily restores the tear film, which is why it often provides immediate relief.

Why Do Dry Eye Symptoms Get Worse During the Day?

One pattern we see repeatedly in clinic is that symptoms are mild first thing in the morning but become progressively worse by the evening.

That's because your tear film is constantly under attack throughout the day.

Common triggers include:

• Computer use

• Mobile phones

• Reading

• Air conditioning

• Central heating

• Wind

• Long-distance driving

• Contact lens wear

As we concentrate, we naturally blink less, allowing tears to evaporate much more quickly.

Why Do These Symptoms Occur?

Dry eye isn't a diagnosis in itself—it's usually the result of another underlying problem.

In our clinic, the most common cause by far is Meibomian Gland Dysfunction (MGD).

These glands produce the oil layer of your tears, helping prevent them from evaporating too quickly.

When they become blocked or stop functioning properly, the tear film becomes unstable, leading to many of the symptoms described above.

Other causes include:

• Blepharitis

• Hormonal changes, particularly during menopause

• Rosacea / ocular rosacea

• Autoimmune conditions such as Sjögren's syndrome

• Certain medications such as antihistamines, decongestants, antidepressants, blood pressure medications and acne treatment - roaccutane.

• Previous eye surgery

• Environmental factors - heavy screen use, air conditioning, central heating

Because different causes require different treatments, identifying the underlying problem is one of the most important parts of a dry eye assessment.

Why Eye Drops Aren't Always Enough

Lubricating eye drops can be extremely helpful, but they're not always the complete solution.

In our clinic, we commonly meet patients who have been using multiple different eye drops for years with little improvement.

That's often because the underlying cause—such as MGD or blepharitis—has never been properly diagnosed.

Rather than simply adding another bottle of artificial tears, a specialist assessment allows us to understand why your eyes are uncomfortable and tailor treatment accordingly.

When Should You Book a Specialist Assessment?

You should consider a comprehensive assessment if:

• Your symptoms persist despite using eye drops.

• Your eyes water excessively.

• Your vision fluctuates during the day.

• Contact lenses have become uncomfortable.

• Your eyes feel gritty, burning or sore.

• Your symptoms are beginning to affect work, driving or everyday life.

Early treatment is important. Meibomian glands can deteriorate over time, and once glands are permanently lost, we currently cannot regenerate them.

How We Diagnose Dry Eye at The Dry Eye Suite

Every patient is different, which is why we don't believe in a one-size-fits-all approach.

During your assessment we evaluate:

• The health of your tear film.

• Your meibomian glands using meibography.

• The eyelid margins.

• The ocular surface.

• Blink quality.

• Signs of blepharitis, Demodex or inflammation.

This allows us to identify the true cause of your symptoms rather than simply confirming that you have "dry eye."

How We Can Help

Following your assessment, we create a personalised treatment plan based on your diagnosis.

Depending on the underlying cause, treatment may include:

• IPL (Intense Pulsed Light)

• Meibomian gland expression

• Blephasteam

• ZEST eyelid treatment

• Punctal plugs

• Prescription or non-prescription home care

• Lifestyle and environmental advice

Our goal isn't simply to make your eyes feel better today—it's to improve the long-term health of your ocular surface and meibomian glands.

Book Your Dry Eye Assessment

If you're experiencing burning, watery, gritty or irritated eyes, don't assume it's just something you have to live with.

Many patients tell us they wish they'd sought help sooner.

A comprehensive assessment can identify the underlying cause of your symptoms and help you receive the most appropriate treatment.

Book your dry eye assessment at The Dry Eye Suite in Harold's Cross, Dublin, and let us help you get to the root cause of your symptoms.