Aircon, screens and dry eyes: why your eyes feel gritty at work

By mid-afternoon your eyes feel dry, gritty, maybe a little red, and staring at the monitor makes it worse. If you work in an air-conditioned office in front of a screen, which describes most desk jobs here, there is a clear reason. Two everyday things are working against your eyes at once.

Why it happens

Your eyes stay comfortable thanks to a thin film of tears that coats the surface and refreshes every time you blink. Two things at work break that film down.

• Air-conditioning pulls moisture out of the air. Dry air makes your tear film evaporate faster, and a vent blowing toward your face speeds it up.
• Screens change how you blink. When you concentrate on a monitor or phone, your blink rate drops sharply, sometimes by half, and many of those blinks are incomplete. Fewer full blinks means the tear film is not being refreshed.

Put them together and the surface of the eye dries out over the day. That is the gritty, tired, slightly burning feeling by 3 p.m.

What actually helps

• Follow 20-20-20. Every 20 minutes, look at something about 20 feet away for 20 seconds. It gives your focusing muscles a rest and prompts a few full blinks.
• Blink on purpose. Every so often, close your eyes fully for a second. It sounds trivial and it works.
• Redirect the aircon. Angle vents away from your face and move your seat out of a direct draft.
• Drop your screen a little. A monitor slightly below eye level means your lids cover more of the eye, so less surface is exposed to dry out.
• Drink water through the day. Hydration supports your tear film.
• Use lubricating drops if you need them. Preservative-free artificial tears from a pharmacy can settle mild dryness. Ask a professional if you are unsure which to use.

Glasses can help too

If you wear contact lenses, they dry out faster in aircon, so switching to glasses for long screen days often brings relief. Lenses set up for computer distance, sometimes with a coating that eases screen glare, can also make a long day gentler on the eyes.

When to have it checked

Occasional dryness at your desk is normal and manageable. But if your eyes are constantly dry, painful, red, or your vision blurs and clears as you blink, it is worth a proper look. Persistent dry eye has real causes that a professional can identify and treat, and it should not be something you just live with.

What to ask for at the counter

Book a Vision7 eye test at your nearest Vision Express store. The seven-step exam checks whether an out-of-date grade is making you lean in and stare, which is often what drives the blink rate down in the first place, and it screens the health of your eyes at the same time. Ask for the Opulens Blue Light 1.56 at the counter. It corrects your grade, cuts the reflections coming off your monitor and the ceiling lights, and filters part of the blue light, which many people find easier on the eyes late in the day.

Be clear on what that lens does and does not do. Blue light lenses are sold for comfort, not for preventing eye disease, and they will not stop your eyes drying out. The dryness comes from blinking less and from air-conditioning, so the vents, the blinking and the 20-20-20 breaks are doing the real work. The lens makes the hours in between easier. Free lifetime ultrasonic cleaning and free lifetime custom fitting and adjustment come with every pair.