Dry Eye: Why It Happens and What Actually Helps

Dry eye is one of the most common reasons patients come to see us, and one of the most commonly self-treated with the least effective approach. If drugstore artificial tears bring you an hour of relief and then the grittiness comes back, that is a sign the drops are not addressing the underlying cause.

The useful thing to understand is this: dry eye is usually less about the amount of tears your eyes make and more about the quality of the tear film sitting on the surface.

Your tear film has three layers

A healthy tear film is not just saltwater. It has three components working together:

• An oily outer layer, produced by small glands along the edge of the eyelids, which keeps the tears from evaporating too quickly.
• A watery middle layer, produced by the lacrimal gland, which carries oxygen and nutrients to the cornea and rinses debris away.
• A mucous inner layer, which lets the whole film spread evenly across the eye instead of beading up.

Break down any one of those and the surface of the eye dries out in patches between blinks. That is what produces the symptoms.

The symptoms are not always what you would expect

Burning, grittiness, a sandy or foreign-body sensation, redness, tired eyes, blurry vision that clears when you blink, and difficulty tolerating contact lenses are all classic.

So is watering. Patients are often surprised that constantly watery eyes point to dry eye, but it makes sense: when the surface of the eye gets irritated, it triggers a flood of reflex tears. Those tears are poor quality and drain away quickly, so the relief is brief and the cycle repeats.

Why it happens

The most common driver is meibomian gland dysfunction — the oil glands along the lid margins get blocked or the oil thickens, so the tear film evaporates too fast. It often coexists with lid inflammation.

Other common contributors:

• Screen use. Blink rate drops substantially during focused screen work, and incomplete blinks do not resurface the tear film properly.
• Age and hormonal changes. Tear production tends to decline over time, and shifts around menopause are a frequent factor.
• Medications. Antihistamines, decongestants, some antidepressants, some blood pressure medications, and others list dry eye among their effects.
• Environment. Air conditioning, ceiling fans, car vents aimed at the face, wind, and salt air all accelerate evaporation. Coastal Florida delivers most of these year-round.
• Contact lens wear, particularly long days in lenses.
• Autoimmune and systemic conditions, including thyroid disease and Sjögren's syndrome.
• Previous eye surgery, including LASIK and cataract surgery.

What actually helps

Treatment works when it targets the specific cause. Which is why the first step is a proper evaluation of the tear film and the lid glands rather than another trip down the pharmacy aisle.

Depending on what we find, a plan may include:

Warm compresses and lid hygiene. Unglamorous, but for evaporative dry eye from blocked oil glands, consistent daily warmth and lid cleaning is genuinely effective. Done properly and daily — not for three days when symptoms flare.

The right drops, used correctly. Artificial tears vary widely in composition, and the ones that suit an evaporative problem are not the ones that suit an aqueous-deficient one. If you use drops more than a few times a day, preservative-free is the better choice. Drops that promise to "get the red out" are worth avoiding for daily use.

Prescription treatment. Some cases involve inflammation that over-the-counter drops cannot touch. Prescription options can address that directly.

In-office gland treatment. When the oil glands are significantly blocked, expressing them in the office clears what home compresses cannot.

Punctal plugs. Tiny inserts that partially close the tear drainage channels so the tears you produce stay on the eye longer. Useful when production is genuinely low.

Environmental and habit changes. Redirecting the car vents, adding humidity, taking real breaks from the screen, staying hydrated, and adjusting contact lens wear time all move the needle.

Get it looked at properly

Dry eye is chronic and it tends to progress if it is left alone, but it responds well to treatment aimed at the right cause. An evaluation includes reviewing your symptoms and medications, examining the tear film, and assessing the oil glands along your lids.

If your eyes burn by mid-afternoon, if you cannot wear your contacts as long as you used to, or if you are buying artificial tears by the case, come in and let us find out why. Call 321-777-1800 or request an appointment online.