Although we commonly call all of these symptoms “dry eye,” dry eye is not the same for everyone.

There are different types of dry eye, and understanding the cause is important because the treatment that works for one person may not be the right treatment for another.

What Is Dry Eye?

Our eyes are covered by a thin layer of tears called the tear film. This tear film keeps the surface of the eye comfortable, smooth and protected.

Dry eye can develop when:

• the eyes do not produce enough tears,

• tears evaporate too quickly,

• or the tear film does not have the right balance of its different components.

This can lead to symptoms such as:

• burning or stinging

• redness

• gritty or sandy feeling

• tired eyes

• blurred or fluctuating vision

• sensitivity to light

• excessive watering

• discomfort while using screens or contact lenses

Interestingly, watery eyes can also be a sign of dry eye. When the surface becomes irritated, the eyes may produce excess watery tears as a reflex, but these tears may not provide the normal lubrication the eye needs.

1. Aqueous-Deficient Dry Eye

In aqueous-deficient dry eye, the eyes do not produce enough of the watery part of the tears.

The tear glands normally produce moisture that keeps the surface of the eye lubricated. When tear production decreases, the eyes may feel persistently dry, irritated or uncomfortable.

This type of dry eye can sometimes be associated with:

• increasing age

• certain medications

• autoimmune conditions

• problems affecting the tear-producing glands

The severity can vary considerably from one patient to another.

2. Evaporative Dry Eye

Evaporative dry eye happens when tears are produced but disappear from the surface of the eye too quickly.

One of the most common reasons is a problem with tiny oil-producing glands along the eyelids called the meibomian glands.

These glands normally release an oily layer that sits on top of the tears and slows down evaporation.

When the glands become blocked or do not produce good-quality oil, tears can evaporate faster than normal.

This condition is known as Meibomian Gland Dysfunction, or MGD, and it is a very common cause of dry eye.

People with evaporative dry eye may notice symptoms becoming worse with:

• long hours of computer or mobile use

• air conditioning

• dry or windy environments

• reduced blinking

• prolonged contact lens use

Suggested Read: Meibomian Gland Dysfunction – A Common Cause of Dry Eye

3. Mixed Dry Eye

Many patients do not fit neatly into only one category.

They may have both reduced tear production and excessive tear evaporation. This is often referred to as mixed dry eye.

For example, a person may produce fewer tears than normal while also having poorly functioning meibomian glands.

This is one reason simply using lubricating eye drops may not completely solve the problem for everyone. The underlying cause needs to be identified.

Why Has Dry Eye Become So Common?

Our daily habits can play an important role.

When we look at a computer or mobile screen for a long time, we tend to blink less frequently and sometimes do not blink completely.

Blinking is important because it spreads the tear film evenly across the eye.

Long periods of screen use, air-conditioned environments, contact lenses, inadequate sleep and certain medications may therefore contribute to dry-eye symptoms in some people.

However, persistent symptoms should not automatically be blamed on screen time. Other eye conditions can cause similar complaints, which is why an eye examination can be useful when symptoms continue.

Why Is Identifying the Type of Dry Eye Important?

Dry eye treatment is not simply about prescribing the same eye drop to every patient.

If the main problem is reduced tear production, treatment may be different from that used when blocked meibomian glands are causing rapid tear evaporation.

During a dry-eye evaluation, the ophthalmologist may examine:

• the quantity of tears

• how quickly the tear film breaks up

• the surface of the eye

• the eyelids

• the meibomian glands

• the quality of the oils produced by these glands

Additional dry-eye tests may also be performed when required.

Understanding why the eye is becoming dry helps the doctor choose a more appropriate treatment plan.

When Should You See an Eye Doctor for Dry Eye?

Occasional eye tiredness after a long day may improve with rest and simple measures.

However, consider having your eyes checked if you regularly experience:

• persistent burning or irritation

• repeated redness

• a gritty sensation

• frequent watering

• fluctuating or blurred vision

• difficulty wearing contact lenses

• symptoms that continue despite using lubricating drops

Repeatedly changing over-the-counter eye drops without understanding the cause may not address the actual problem.

At Pixel Eye Hospital in Kukatpally and Sanath Nagar, Hyderabad, patients with persistent dry-eye symptoms can undergo an eye and tear-film evaluation to understand the possible cause. Dr. Krishna Poojita and Dr. Abdul Rasheed are part of the ophthalmology team at Pixel Eye Hospital, and treatment can be planned according to the individual eye condition rather than symptoms alone.

Understanding the Cause Is the First Step

Dry eye is not just one condition.

Some people do not produce enough tears, some lose tears too quickly because of evaporation, and many have a combination of both problems.

Identifying the type and severity of dry eye can make treatment more targeted and help patients understand why their symptoms keep returning.

If you are experiencing persistent dry eyes in Hyderabad, you can consult the ophthalmology team at Pixel Eye Hospital, Kukatpally or Sanath Nagar, for an evaluation of your tear film, eyelids and overall eye health.