Dry eye is a condition in which the eyes do not produce enough tears, or the quality of the tears is insufficient to keep the surface of the eyes adequately lubricated. This condition can cause stinging, burning, a gritty sensation, redness, light sensitivity, and blurred vision.
Dry eyes can occur occasionally, but persistent symptoms should be addressed because they can affect comfort and daily activities.
Why do dry eyes persist? The causes may be related to insufficient tear production, excessive tear evaporation, prolonged screen use, dry or windy environments, contact lens use, certain medications, or certain health conditions.
What Is Dry Eye?
Dry eye occurs when the quantity or quality of tears is insufficient to keep the surface of the eyes healthy and comfortable.
Tears do more than simply keep the eyes moist. The tear film also helps protect the surface of the eyes and supports clear vision. When the tear film is unstable, the eyes may feel dry while also experiencing irritation or fluctuating vision.
What Are the Symptoms of Dry Eye?
Symptoms of dry eye can vary from person to person.
Common symptoms include:
- Dry or gritty-feeling eyes.
- A sensation of having sand or something in the eyes.
- Stinging or burning eyes.
- Red eyes.
- Itchy eyes.
- Watery eyes.
- Sensitivity to light.
- Blurred or fluctuating vision.
- Easily tired eyes.
Interestingly, dry eyes can also cause the eyes to water more frequently. Irritation of the eye surface can trigger reflex tear production, but these tears may not necessarily correct the imbalance in the tear film.
What Causes Dry Eye?
Dry eye can occur due to several factors.
1. Reduced Tear Production
The eyes need an adequate amount of tears to keep their surface properly lubricated. Tear production may decrease with age or may be affected by certain conditions.
2. Excessive Tear Evaporation
Tears can evaporate more quickly when a person is exposed to windy or smoky environments or uses air conditioning for extended periods. Problems with the tear film can also cause the surface of the eyes to dry out more quickly.
3. Prolonged Screen Time
When using a computer, tablet, or smartphone for extended periods, the frequency of blinking may decrease. As a result, the surface of the eyes is not adequately replenished with tear film, which can cause or worsen dry eye symptoms.
4. Contact Lens Use
Contact lens use may be associated with dry eye symptoms in some people. If the eyes feel dry, painful, red, or gritty while wearing contact lenses, the condition should be evaluated.
5. Environmental Factors
Dry air, smoke, dust, wind, and exposure to air conditioning can worsen dry eye symptoms.
6. Certain Medications or Health Conditions
Certain medications and health conditions can increase the risk of dry eye. Because dry eye can have various causes, persistent symptoms should not be managed based solely on the symptoms.
Why Can Dry Eyes and Watery Eyes Occur at the Same Time?
They can. Dry eyes do not always mean that the eyes visibly lack moisture.
When the surface of the eyes becomes irritated, the body may produce a larger amount of reflex tears. However, these reflex tears do not always have the same composition or stability as a normal tear film. As a result, the eyes may continue to feel dry even when they are frequently watering.
Can Dry Eyes Cause Blurred Vision?
Yes.
An unstable eye surface can cause vision to become blurred or fluctuate. This symptom may sometimes be more noticeable when reading, working on a computer, or performing activities that require prolonged visual focus. If blurred vision persists or worsens, other possible causes besides dry eye should also be evaluated.
How Can Dry Eyes Be Managed?
Treatment for dry eye depends on its cause and severity.
Several measures that may help include:
- Taking regular breaks when using digital screens.
- Avoiding exposure to wind, smoke, and excessively dry air.
- Reducing excessive use of air conditioning.
- Blinking regularly while looking at a screen.
- Wearing protective eyewear when in windy environments.
- Using artificial tears as needed and as recommended by a healthcare professional.
In certain conditions, a doctor may prescribe additional treatment based on the underlying cause of dry eye.
Can Eye Drops Treat Dry Eye?
Artificial tears can help relieve dry eye symptoms, particularly in mild cases.
However, not all eye drops serve the same purpose. If dry eye frequently recurs, requires very frequent use of eye drops, or does not improve despite using artificial tears, an eye examination is necessary to determine the underlying cause. In certain cases, a doctor may recommend prescription eye drops or other treatments based on the patient’s condition.
How Do Doctors Diagnose Dry Eye?
The diagnosis of dry eye is not based solely on symptoms.
A doctor may examine:
- The surface of the eyes.
- The eyelids.
- The quality and stability of the tear film.
- Tear production.
- The rate of tear film evaporation.
Certain tests may be performed, such as the Schirmer test to assess tear production and the tear break-up time (TBUT) test to evaluate tear film stability.
These examinations help determine the type and possible cause of dry eye so that treatment can be appropriately tailored.
When Should Dry Eye Be Examined by a Doctor?
Have your eyes examined if:
- Dry eye symptoms persist.
- Symptoms become more frequent or severe.
- Your eyes feel painful.
- Your eyes are very red.
- Your vision becomes blurred.
- Your eyes are highly sensitive to light.
- Daily activities are beginning to be affected.
- Symptoms do not improve with simple self-care measures.
Severe, untreated dry eye can affect the surface of the cornea, so an eye examination is recommended when symptoms persist or become increasingly disruptive.
Can Dry Eye Be Completely Cured?
It depends on the cause.
For some people, symptoms can be controlled through lifestyle changes and appropriate treatment. However, some types of dry eye are chronic, meaning that treatment focuses more on controlling symptoms, maintaining a healthy eye surface, and addressing the underlying cause.
Therefore, treatment should be tailored to the underlying cause rather than based solely on the symptoms.
FAQ About Dry Eye
Dry eyes can be caused by insufficient tear production, excessive tear evaporation, prolonged screen time, dry environments, contact lens use, certain medications, or certain health conditions.
Irritation caused by dry eye can trigger reflex tear production. Therefore, dry eyes and watery eyes can occur at the same time.
Yes. An unstable tear film can cause blurred or fluctuating vision, especially during prolonged visual activities.
Artificial tears can be used to help relieve symptoms, but the frequency of use varies from person to person. If you need to use eye drops very frequently or your symptoms do not improve, an eye examination is recommended.
Have your eyes examined if symptoms persist, become more severe, or are accompanied by pain, significant redness, light sensitivity, or vision problems.
Conclusion
Dry eye occurs when the quantity or quality of tears is insufficient to keep the surface of the eyes healthy and comfortable. This condition can cause stinging, a gritty sensation, redness, watery eyes, light sensitivity, and blurred vision.
The causes of dry eye can vary, ranging from prolonged screen use and dry environments to contact lens use, certain medications, or certain health conditions.
Artificial tears and lifestyle changes may help in some cases. However, if dry eye persists or affects vision, an examination by an ophthalmologist is important to determine the underlying cause and appropriate treatment.
Reference:
National Eye Institute – Dry Eye
National Eye Institute -Testing for Dry Eye
National Eye Institute – Causes of Dry Eye
American Academy of Ophthalmology – Dry Eye
