جفاف العين في 2026: لماذا لم يعد "نقص الدموع" تفسيرًا كافيًا؟

English version

Dry Eye in 2026: Why "Not Enough Tears" Is No Longer an Adequate Explanation

Why can a dry eye actually water?

One of the most confusing features of dry-eye disease is that a dry eye can look watery. Ocular-surface irritation can trigger reflex tearing, but reflex tears do not necessarily create a stable, high-quality tear film. Patients may experience burning, grittiness, light sensitivity, fluctuating blur or screen-related fatigue even when their eyes appear to water.

TFOS DEWS III emphasizes that dry eye is a multifactorial disease involving loss of tear-film or ocular-surface homeostasis, not simply a shortage of tear volume.

Meibomian glands: a major driver that is often missed

The meibomian glands along the eyelid margin produce the lipid layer of the tear film. If these glands become obstructed or their secretions change, tears evaporate more quickly. A patient may therefore produce an adequate amount of tears yet still have an unstable ocular surface.

Meibomian-gland dysfunction is a major contributor to evaporative dry eye, which is why lid-margin examination, gland function and blink quality are important parts of assessment.

Screens do not "burn" the eye, but they change blinking behavior

During concentrated screen use, blink rate often decreases and blinks may become incomplete. This increases evaporation and ocular-surface exposure. Air-conditioning, dry environments, wind and smoke can add to the problem.

Management is not simply "stop using screens." It may include scheduled visual breaks, complete blinking, changing airflow and treating underlying gland dysfunction or inflammation.

How is dry eye diagnosed in modern practice?

The TFOS DEWS III diagnostic framework combines symptoms with objective evidence of disturbed homeostasis. Clinicians may use symptom questionnaires, non-invasive tear break-up time, ocular-surface staining, osmolarity in selected settings, and detailed evaluation of the eyelids and meibomian glands.

The purpose is not to collect numbers for their own sake. It is to identify the disease drivers so treatment can be targeted rather than based on random trial-and-error lubricants.

Treatment is layered, not one drop for everyone

Mild disease may improve with suitable lubricants and environmental changes. If meibomian-gland dysfunction is prominent, warm compresses, lid care and selected in-office treatments may be useful. When inflammation is significant, prescription anti-inflammatory or immunomodulatory therapy may be indicated under medical supervision.

More severe disease can require punctal occlusion in selected patients, biological tear substitutes such as autologous serum, scleral lenses or other therapies. DEWS III favors cause-directed treatment rather than a rigid one-size-fits-all ladder.

Dry eye before and after refractive surgery

Anyone considering laser vision correction should have the ocular surface assessed before surgery. Pre-existing dry eye can worsen postoperative symptoms and can reduce the repeatability of refractive and corneal measurements.

If dry-eye symptoms occur after refractive surgery, many cases improve with time and appropriate management. Persistent or severe symptoms deserve a fresh evaluation of the ocular surface, lid glands, inflammation and neurosensory factors rather than indefinite repetition of the same lubricant.

Bottom line

The useful question in dry eye is not "Which drop is strongest?" It is "What is driving my disease?" Once the main mechanism is identified, treatment can address tear-film quality, eyelid glands, inflammation, environment or systemic and medication-related contributors in a rational way.

Frequently asked questions

Can dry eye cause blurry vision?

Yes. Tear-film instability can cause fluctuating blur that sometimes improves temporarily after blinking.

Are artificial tears enough for every case?

No. They help many patients, but meibomian-gland disease, inflammation or systemic causes may require additional targeted treatment.

Do screens cause dry eye?

They can worsen symptoms because blink rate and blink completeness often decrease during concentrated screen use.

Does dry eye prevent laser vision correction?

Uncontrolled dry eye can delay surgery and should be treated before candidacy is reassessed.

Medical note: This content is for education and does not replace an examination by an ophthalmologist, particularly for sudden vision loss, severe pain or other urgent symptoms.