Dry Eye in Summer: Why It Worsens and How to Manage It Slug

The number of patients complaining of burning and red eyes rises every summer alongside the temperature. The cause isn't just the heat itself, but a combination of factors working toward a single outcome: the evaporation of the tear film.

How do tears work?

Tears are not merely water. They form a thin, multi-layered film covering the eye's surface, featuring an outer lipid (oily) layer whose primary function is to prevent evaporation.

With every blink, this film is redistributed across the cornea. If it evaporates faster than it is replenished, or if the lipid layer is compromised, the eye's surface becomes exposed—leading to burning, redness, and a gritty, sandy sensation.

Why does the condition worsen specifically in summer?

Air conditioning. It is the undisputed primary culprit. It dries out the room's air and keeps it circulating; both actions accelerate evaporation. Sitting directly in the path of the cold airflow is the worst possible scenario.

Fans—for the same reason. Sleeping with a fan blowing directly onto one’s face is a very common reason for patients to wake up with eyes that feel burning and stuck shut.

Dry air and dust. Our summer is naturally dry, and dust storms add direct mechanical irritation to that dryness.

Fluid deficiency. General body dehydration affects tear production.

Summer allergies: They cause itching and rubbing, and rubbing only makes matters worse.

Exposure to sun and wind—whether driving with the window open or sitting outdoors.

Added to all this is a factor unrelated to the season: long hours spent looking at screens, which cuts the blinking rate by nearly half.

The Paradox: A dry eye that waters

Many patients are surprised when I tell them that their excessive tearing is actually caused by dryness.

The explanation is simple: a dry eye surface is an irritated one. The eye responds to this irritation by suddenly producing a flood of reflex tears. However, these emergency tears lack the balanced composition needed to truly moisturize the eye, so they run down the cheek instead of staying where they are needed.

If your eyes water when exposed to the air or air conditioning, consider that dryness—not an excess of tears—might be the cause.

What are the symptoms?

Burning or stinging

A sensation of grit or a foreign object in the eye

Redness that worsens in windy or dusty conditions

Intermittent blurriness that improves with blinking—a hallmark sign

Sensitivity to light

Intolerance to contact lenses

Intermittent excessive tearing

What helps?

Direct the airflow from your air conditioner away from your face; this is the simplest yet most beneficial step. Also, avoid sleeping directly under a fan.

Wear wraparound sunglasses when outdoors; they block the sun and shield your eyes from the wind.

Artificial tears. Use them regularly, not just when you feel discomfort. If you need to use them more than six times a day, choose a preservative-free variety; frequent use of drops containing preservatives can actually cause irritation.

Apply warm compresses to your eyelids for a few minutes daily and clean the eyelid margins. Many cases of dry eye stem from eyelid oil gland dysfunction rather than a lack of moisture.

Drink plenty of water.

Blink intentionally while working at a screen and follow the 20-20-20 rule.

Switch from contact lenses to glasses on particularly bad days or during long work hours.

Do not rub your eyes; rubbing offers momentary relief but worsens the condition for hours afterward.

When should you see a doctor?

If symptoms persist despite the measures above.

If you experience actual pain—not just discomfort.

If your vision is affected and does not improve with blinking.

If redness is severe or affects only one eye.

If there is any discharge.

If you have been using eye drops daily for weeks without improvement.

Chronic dry eye can be linked to underlying medical conditions or medications you are taking—such as antihistamines, blood pressure medication, diuretics, and certain antidepressants. Identifying the root cause can completely change the treatment approach.

Summary

Summer dry eye is common and bothersome, yet manageable in most cases with simple adjustments—foremost among them keeping air conditioner airflow away from your face.

However, if symptoms are persistent, painful, or affect your vision, you should get a medical check-up. Dry eye is a condition with multiple causes, and treatment begins with identifying which one is responsible in your specific case.