Causes and Risk Factors
A healthy tear film has watery, oily, and mucus layers; trouble with any layer causes symptoms. Common contributors include:- Aging and hormonal change: Tear production declines with age, and women are affected more often, particularly after menopause.
- Oil gland dysfunction: Blocked meibomian glands along the eyelids let tears evaporate too fast — the single most common cause.
- Screen time and reading: Concentrating on screens cuts the blink rate roughly in half, drying the eye surface.
- Medications: Antihistamines taken for hay fever, decongestants, some antidepressants, and diuretics all reduce tear production, and some drops used for glaucoma can irritate the eye surface.
- Medical conditions: Autoimmune diseases — including Sjogren's syndrome and forms of inflammatory arthritis — as well as thyroid disorders and eyelid problems can drive persistent dryness.
- Environment: Air conditioning, ceiling fans, wind, and low humidity speed tear evaporation.
- Contact lenses and eye surgery: Years of lens wear, and procedures such as LASIK or cataract surgery, can reduce corneal sensation and tear production for months afterward.
Symptoms
Dry eye produces a characteristic cluster of complaints, usually in both eyes:- Burning, stinging, or a gritty, sandy feeling: As though something is in the eye.
- Redness and irritation: Often worse late in the day, after screen use, or in air-conditioned rooms.
- Paradoxical watering: Irritation triggers reflex tears that overflow but do not lubricate, so watery eyes can actually signal dryness.
- Fluctuating blurry vision: Vision that clears briefly with blinking points to an unstable tear film.
- Stringy mucus or morning crusting: Discharge along the lash line and in the corners of the eye, usually worst on waking.
- Contact lens intolerance: Lenses that were once comfortable become unwearable by mid-afternoon.
Diagnosis
Diagnosis rests on your symptom history, a review of medications and medical conditions, and an eye examination. An eye specialist may measure tear production, check how quickly the tear film breaks up, and use harmless dyes to highlight dry patches on the eye's surface. Part of the evaluation is separating dry eye from conditions that feel similar — eyelid inflammation, allergic eye disease, and infection all cause redness and irritation but call for different treatment. When dryness is severe or comes with dry mouth or joint symptoms, blood tests for thyroid and autoimmune disease are reasonable.Treatment
Most people improve with a stepwise approach:- Artificial tears: Preservative-free lubricating drops used regularly — not just when symptoms peak — are the foundation; gels or ointments help overnight.
- Eyelid care: Warm compresses and gentle lid cleansing unclog oil glands and improve tear quality.
- Habit and environment changes: Follow the 20-20-20 rule (every 20 minutes, look 20 feet away for 20 seconds), lower screens below eye level, use a humidifier, and redirect fans and vents.
- Prescription therapy: Anti-inflammatory drops such as cyclosporine or lifitegrast boost natural tear production; tiny punctal plugs can keep tears on the eye longer.
- A medication review: Where good alternatives exist, adjusting a drying antihistamine, decongestant, or other contributing prescription can help more than any drop.
Complications
Chronic dryness leaves the surface of the eye vulnerable. Ongoing inflammation can cause small corneal abrasions, raise the risk of eye infection, and in severe, long-untreated cases scar the cornea and blur vision permanently. Dry eye also makes contact lens wear difficult and complicates recovery from cataract or refractive surgery, so it is worth treating well before any elective eye procedure.When to Seek Immediate Care
Routine dryness should not cause true eye pain. Seek prompt evaluation for significant pain, marked light sensitivity, a sudden change in vision, thick colored discharge, or an eye that is red and painful after an injury or with contact lenses in place. Zimmer Medical Group's St. Petersburg primary care team can review medications that worsen dry eye, screen for underlying conditions, and coordinate specialty eye care — schedule a visit if your eyes burn, itch, or blur through the day.Getting Dry Eye Under Control
Dry eye is chronic, and most people who stay miserable with it are using the right treatments too rarely or at the wrong stage. The details that make the routine work, the conditions it hides, and the Florida-specific factors are below.
Drops on a schedule, not on demand
Artificial tears used four times a day before the eyes feel dry keep the surface stable; used only when burning starts, they treat damage already done. Preservative-free single-use vials are needed for anyone using drops more than four times a day, because the preservative in multi-dose bottles irritates the surface. Redness-relief drops are avoided altogether; they constrict vessels, wear off, and leave the eye redder. A thicker gel at bedtime covers the hours when blinking stops.
Warm compresses need heat that lasts
A washcloth cools within a minute, long before blocked oil glands soften. A microwaveable eye mask held at a comfortable warmth for eight to ten minutes, followed by gentle lid massage and lid cleansing, done daily for a month, is what unblocks meibomian glands. Persistent gland disease, particularly with facial flushing, is often ocular rosacea, and a low-dose course of doxycycline or an omega-3 supplement improves oil quality for some people; our rosacea article covers the connection.
The medications that dry the eye
Sedating antihistamines dry the eye the most, and switching to fexofenadine or loratadine for hay fever helps more than any drop. Glaucoma drops such as timolol and latanoprost contain preservatives that inflame the surface over years, and preservative-free versions exist. Diuretics, some antidepressants, and isotretinoin also reduce tears, so the medication list is reviewed before treatment is escalated.
The conditions it hides
Dryness with a dry mouth, joint pain, or fatigue is tested for Sjogren's syndrome, which is underdiagnosed and needs different care. Dry eye is common in rheumatoid arthritis, diabetes, and thyroid disease, and often worsens through menopause. Incomplete eyelid closure in sleep, and after Bell's palsy, dries one eye far more than the other and is treated with taping or ointment rather than more drops.
Florida, screens, and surgery
Air conditioning and ceiling fans running all night are the usual reason symptoms are worst on waking; redirecting the airflow and a bedroom humidifier help, as our dry eye and air conditioning article explains. Wraparound sunglasses cut wind and glare on the water, and the computer vision syndrome guide covers blink rate and screen placement. Dry eye is treated for several weeks before cataract or LASIK surgery, because an unstable tear film distorts the measurements and slows healing. Our ophthalmology team coordinates prescription drops and procedures. The National Eye Institute and the American Academy of Ophthalmology publish patient guidance on dry eye.
If your eyes still burn after a month of scheduled drops and warm compresses, or dryness comes with a dry mouth or joint pain, schedule a visit.