Environmental dry eye often appears as a pattern: eyes feel manageable in the morning, then become gritty, burning, red or fatigued after hours at a screen, in moving air or during travel.

Why do screens make eyes feel dry?

Concentrated visual tasks can reduce blink frequency and make blinks less complete. That leaves the tear film less evenly refreshed. The effect can be amplified by an overhead vent, a fan, low humidity or contact lenses.

Screen brightness is not the only variable. Small text, glare, an upward gaze and long uninterrupted work can all encourage visual concentration and incomplete blinking. A comfortable workstation therefore addresses viewing behaviour and the surrounding air, not simply “blue light.”

Why are flights and climate-controlled spaces difficult?

Aircraft cabins and many heated or air-conditioned environments are dry. Direct airflow speeds evaporation, while long periods of reading or screen use add blink-related stress. The Canadian Thealoz Total instructions specifically list air conditioning, plane journeys and long hours at a computer among environmental factors associated with symptoms.

How Thealoz Total fits an environmental dry-eye routine

• Hyaluronic acid 0.15% holds water and lubricates the eye surface.
• Trehalose 3% provides protective and hydrating properties during drying stress.
• NAAGA 2.45% contributes soothing properties and helps reduce itching sensations.
• Preservative-free format supports repeated use as directed without adding a preservative.

The recommended use is one drop in each eye, 3 to 6 times daily. Follow the label and any personalized instructions from your eye care professional.

Seven habits that support comfortable eyes

1. Use distance breaks: regularly look away from the screen and focus farther away.
2. Blink deliberately: a few slow, complete blinks can redistribute the tear film.
3. Move the vent: direct car, office and airplane airflow away from your face.
4. Lower the screen: a slightly downward gaze may reduce exposed ocular surface area.
5. Increase text size: reduce squinting and sustained visual effort.
6. Plan contact-lens backup: carry glasses for long workdays or flights.
7. Keep the bottle clean: never touch the tip to the eye, fingers or another surface.

A simple workday schedule

Begin by positioning the monitor slightly below eye level and removing direct airflow. During focused work, use a recurring cue to look into the distance and complete several full blinks. At lunch or another natural break, step away from the screen instead of switching immediately to a phone. Apply Thealoz Total according to its 3-to-6-times-daily directions or a personalized schedule from your eye care professional.

If symptoms predictably appear late in the day, note the timing, environment, lens-wear hours and activities. That pattern can help an optometrist distinguish a workstation problem from a broader dry-eye issue.

What should go in a dry-eye travel kit?

• The capped eye-drop bottle in a clean, upright pouch
• Backup glasses if you normally wear contact lenses
• A lens case and fresh approved solution—never water
• Sunglasses for wind and bright outdoor conditions
• A note of when the bottle was first opened

Keep the product between 8°C and 25°C and away from direct sunlight or humidity. Do not leave it in a hot vehicle or use it beyond three months after opening.

When the environment may not be the whole explanation

Environmental triggers can expose an underlying tear-film problem rather than fully explain it. If symptoms persist on low-screen days, occur on waking, are strongly one-sided or come with pain, discharge, marked light sensitivity or vision change, seek assessment. Eyelid inflammation, meibomian gland dysfunction, allergy, medication effects and other conditions may need different management.

Frequently asked questions

Can I use Thealoz Total on a flight?

The instructions identify plane journeys as a possible trigger and recommend 3 to 6 applications daily. The bottle can leak after low-pressure exposure, so store it securely.

Is it compatible with contact lenses?

Yes. The Canadian instructions state that it can provide ocular comfort while wearing any type of contact lens.

How should it be stored?

Between 8°C and 25°C, away from direct sunlight and humidity. Discard it three months after first opening.

What if screen breaks and drops are not enough?

Persistent symptoms can reflect several dry-eye patterns or another eye condition. An optometrist or ophthalmologist can assess the tear film, eyelids and ocular surface.

Does drinking more water cure screen-related dry eye?

General hydration is important, but it does not correct every tear-film problem. Blink behaviour, airflow, eyelid health, lenses and ocular-surface disease may still need attention.

Should I aim a humidifier at my face?

No. Use it to improve room humidity according to the manufacturer’s directions, and avoid directing moving air at the eyes. Keep the unit clean to prevent contamination.

Sources

• Thealoz Total
• Canadian Thealoz Total Instructions for Use, version 01-06/2025.
• TFOS DEWS II Management and Therapy Report

Educational information only. Seek professional advice for persistent symptoms, pain or vision changes.