Dry Eye Syndrome

Dry eye syndrome occurs when the eyes don't produce enough quality tears to stay properly lubricated. It causes irritation, blurry vision, and, in severe cases, damage to the eye surface.

Table of Contents

Quick Facts

  • ICD-10: H04.12
  • Common in: Older adults, screen users
  • Two main types: Aqueous-deficient, evaporative
  • Treatment: Drops, lifestyle, procedures

Overview

Healthy tears have three layers — water, oil (lipid), and mucin. Problems with any layer can cause dry eye. The two main types are:

  • Aqueous-deficient — not enough tear production (e.g., aging, Sjögren's).
  • Evaporative — tears evaporate too quickly, often due to meibomian gland dysfunction.

Symptoms

  • Stinging or burning
  • Gritty 'sand in the eye' feeling
  • Stringy mucus around the eyes
  • Light sensitivity
  • Eye redness
  • Blurred vision that fluctuates with blinking
  • Watery eyes (paradoxical reflex tearing)
  • Difficulty wearing contact lenses

Causes

  • Aging
  • Hormonal changes (menopause, pregnancy)
  • Medications: antihistamines, antidepressants, decongestants, blood pressure drugs
  • Autoimmune disease (Sjögren's syndrome, rheumatoid arthritis)
  • Meibomian gland dysfunction
  • Excessive screen use (reduced blinking)
  • Contact lens wear
  • LASIK and other eye surgeries
  • Dry or windy environments, air conditioning

Diagnosis

  • Slit-lamp examination
  • Tear film tests (TBUT, Schirmer's test)
  • Surface staining with dyes (fluorescein, lissamine green)
  • Meibography to assess oil glands
  • Tear osmolarity testing

Treatment

First-line

  • Lubricating eye drops and gels
  • Lifestyle: 20-20-20 rule, humidifier, avoid direct fans
  • Warm compresses and lid hygiene for meibomian gland dysfunction
  • Omega-3 supplementation (mixed evidence)

Medications

  • Cyclosporine eye drops
  • Lifitegrast eye drops
  • Short courses of topical steroids for flares

Procedures

  • Punctal plugs to retain tears
  • Intense pulsed light or thermal pulsation for meibomian gland disease
  • Autologous serum tears for severe cases

Prevention

  • Take regular screen breaks
  • Position screens slightly below eye level (less surface exposure)
  • Avoid direct airflow from fans, vents, hair dryers
  • Stay hydrated
  • Treat eyelid inflammation (blepharitis) early

When to See a Doctor

See an eye doctor if dry eye affects your daily activities, isn't relieved by over-the-counter drops, or comes with vision changes, severe pain, or eye redness.

Related Conditions

Eye Pain

Often accompanies dry eye

 Sjögren's Syndrome

Autoimmune cause of severe dry eye

 Conjunctivitis

Inflammation of the eye surface

 Light Sensitivity

Common with dry eye

Frequently Asked Questions

Why do my dry eyes water so much?

Reflex tears triggered by surface irritation are different from the lubricating basal tears that are deficient in dry eye. They are typically more watery and less protective.

Are over-the-counter drops enough?

For mild dry eye, preservative-free artificial tears used several times a day are often sufficient. Persistent or severe symptoms usually need a prescription strategy.

Will LASIK make dry eye worse?

LASIK can worsen dry eye, especially in the first 6–12 months. Surgeons typically screen for and pre-treat dry eye before surgery.

Can dry eye damage my vision?

Severe untreated dry eye can damage the cornea and impair vision. Most mild-moderate cases do not threaten vision when managed properly.

Medical Disclaimer: This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with questions about a medical condition. If you are experiencing a medical emergency, call your local emergency number immediately.

References

  • American Academy of Ophthalmology. Dry Eye Patient Information.