Dry Eye
When the eyes lack enough quality tears to stay comfortable
Quick Facts
- Type: Eye surface (ocular) condition
- Common causes: Aging, screens, dry environments, medications
- Main symptoms: Burning, grittiness, blurred vision
- Treatment: Artificial tears, eyelid care, addressing triggers
Overview
Dry eye is a very common condition that occurs when the eyes do not have enough healthy tears to stay lubricated. This can happen because the eyes make too few tears, the tears evaporate too quickly, or the tear film is of poor quality. The result is a dry, irritated surface that can feel gritty, burning, or scratchy.
A healthy tear film coats the eye with a smooth layer of water, oil, and mucus that protects the surface and keeps vision clear. When this balance is disrupted, the eye becomes inflamed and uncomfortable. Dry eye is usually a chronic condition that can be managed effectively, though it often requires ongoing care.
Symptoms
Dry eye can affect one or both eyes and tends to come and go. Common symptoms include:
- A stinging, burning, or scratchy sensation
- A feeling that something is in the eye (grittiness)
- Redness and irritation
- Sensitivity to light
- Blurred vision that improves with blinking
- Stringy mucus in or around the eyes
- Difficulty wearing contact lenses
- Watery eyes, which can paradoxically occur as a reflex response to dryness
Symptoms often worsen with screen use, wind, air conditioning, or at the end of the day.
Causes
Dry eye is generally divided into two overlapping types: not enough tear production and tears that evaporate too quickly. Common causes include:
- Aging: Tear production naturally decreases with age.
- Meibomian gland problems: Blocked oil glands in the eyelids let tears evaporate too fast.
- Reduced blinking: Long periods of screen use or reading reduce blink rate.
- Environment: Wind, smoke, dry air, and air conditioning.
- Medications: Antihistamines, decongestants, some antidepressants, and blood pressure drugs.
- Medical conditions: Autoimmune diseases such as Sjogren's syndrome and certain thyroid or eyelid disorders.
- Contact lens wear and previous eye surgery.
Risk Factors
- Older age, especially after 50
- Being female, particularly with hormonal changes such as menopause
- Prolonged screen use
- Wearing contact lenses
- Autoimmune conditions like Sjogren's syndrome or rheumatoid arthritis
- Living in dry, windy, or smoky environments
- Use of certain medications
Diagnosis
An eye care professional can diagnose dry eye through a history of symptoms and an eye examination.
- Slit-lamp examination: A close look at the eye surface and eyelids.
- Tear film tests: Measuring how quickly tears evaporate (tear break-up time).
- Tear volume test: A small paper strip (Schirmer test) measures tear production.
- Surface staining: Special dyes highlight dry or damaged areas on the eye.
If an underlying condition is suspected, additional tests may be ordered.
Treatment
Treatment aims to restore comfort, protect the eye surface, and address the cause. Options include:
- Artificial tears: Over-the-counter lubricating drops; preservative-free versions are gentler for frequent use.
- Eyelid care: Warm compresses and gentle lid cleaning help unblock oil glands.
- Prescription drops: Anti-inflammatory drops can increase tear production in some people.
- Punctal plugs: Tiny inserts that keep tears on the eye longer.
- Environmental changes: Taking screen breaks, using a humidifier, and avoiding direct airflow.
- Treating underlying conditions: Such as managing an autoimmune disease or adjusting medications.
Prevention
- Follow the 20-20-20 rule during screen use: every 20 minutes, look about 20 feet away for 20 seconds
- Blink fully and often when reading or using devices
- Use a humidifier in dry indoor air and avoid direct fans or vents
- Wear wraparound sunglasses outdoors to reduce wind and evaporation
- Stay hydrated and avoid smoke
- Take regular breaks from contact lenses
When to See a Doctor
See an eye care professional if dry eye symptoms are persistent, worsening, or interfere with daily activities, or if over-the-counter drops are not helping. Prompt evaluation is important if you have eye pain, significant redness, light sensitivity, vision changes, or a feeling that something is stuck in the eye, as these may signal a more serious problem that needs treatment.
Frequently Asked Questions
Why do my eyes water if they are dry?
Watery eyes can be a reflex response to dryness. When the eye surface becomes irritated, it triggers a burst of tears that drain away quickly without properly coating the eye, so the underlying dryness continues. This is why dry eye and watering can happen together.
Can screen use cause dry eye?
Yes. Staring at screens reduces how often you blink, which lets the tear film break up and the eye surface dry out. Taking regular breaks, blinking fully, and following the 20-20-20 rule can help reduce symptoms.
Are artificial tears safe to use every day?
Lubricating artificial tears are generally safe for regular use. If you use drops more than a few times a day, preservative-free versions are gentler on the eyes. See an eye care professional if you need drops very frequently or they stop helping.
Is dry eye a permanent condition?
Dry eye is often a chronic, long-term condition, especially when related to aging or autoimmune disease. It usually cannot be cured but can be well controlled with drops, eyelid care, environmental changes, and treating any underlying cause.
When should dry eye be checked by a doctor?
See an eye care professional if symptoms are persistent or worsening, if drops do not help, or if you have eye pain, marked redness, light sensitivity, or vision changes, which may point to a more serious problem.
References
- National Eye Institute (NEI). Dry Eye.
- American Academy of Ophthalmology. Dry Eye.
- Mayo Clinic. Dry eyes — Symptoms and causes.
- MedlinePlus, U.S. National Library of Medicine. Dry eye syndrome.