Why are my eyes always red?

Redness is not a diagnosis. It is what the surface of your eye does when the tiny blood vessels sitting on it dilate — and they dilate for a long list of reasons, most of them unremarkable, a few of them urgent.

Here is how to read your own eyes, and where the line is.

The everyday causes

• Dryness. The most common cause by far. Air-conditioning, ceiling fans, long screen sessions and a fifteen-hour day all reduce the tear film. Dry surface tissue irritates, and irritated tissue reddens.
• Screen time. You blink roughly half as often when concentrating on a screen. Fewer blinks means less tear spreading, which loops straight back to dryness.
• Allergies. Dust, pollen and pet dander produce redness with itching. Itch is the giveaway: allergic eyes itch, infected eyes usually do not.
• Contact lens overwear. Too many hours, an old lens, or a lens worn through a nap. Redness after removing lenses is your eye telling you the schedule is too long.
• Poor sleep, alcohol, smoke. All of them dilate surface vessels or dry the eye out.
• Uncorrected or wrong prescription. Straining to focus all day produces fatigue and redness that people rarely connect back to their glasses.

The local version

Two Philippine specifics come up constantly across our counters. The commute — open windows, exhaust, road dust and wind straight into the eye — and the air-conditioned office, which is a low-humidity environment your tear film has to fight all day. People often have both, eight hours apart.

Rainy season adds a third. Floodwater carries organisms you do not want anywhere near your eyes, particularly if you wear contact lenses.

Stop using whitening drops

Drops sold to take the red out work by constricting the surface blood vessels. They do nothing about the cause, and with regular use you can get rebound redness — the vessels dilate harder when the drop wears off, so you need it more often. That is how a cosmetic fix turns into a daily habit.

Preservative-free lubricating drops are the better default for dryness. They address the actual problem rather than hiding the signal.

When redness needs attention today

Get seen the same day if redness comes with any of these:

• Pain — real pain, not grittiness
• Light sensitivity that makes you want to close the eye
• Blurred or reduced vision
• Thick discharge, or lids stuck together in the morning
• Redness concentrated in a ring right around the coloured part of the eye
• Redness in a contact lens wearer that does not settle within hours of taking the lenses out
• Anything after an injury, a chemical splash, or metal or dust entering the eye

A bright red patch on the white of the eye with no pain and no vision change is usually a burst surface vessel. It looks dramatic and normally clears on its own over a couple of weeks. Worth mentioning at your next visit, not worth panicking over.

What helps in the meantime

• Blink deliberately and fully when you are on a screen. Full closure spreads the tear film.
• Look away from the screen regularly and let your focus relax at distance.
• Redirect the aircon vent away from your face.
• Wash your hands before touching your eyes, and do not rub them.
• Take contact lenses out earlier in the day and wear glasses for the evening.

Book the test

Book a Vision7 eye test at your nearest Vision Express store. The visual health step examines the front surface of your eye and the lid margins, which is where the cause of persistent redness usually shows up — and the refraction steps rule out an uncorrected grade that has been making your eyes work too hard.

If your redness tracks with screen hours, ask for Opulens Blue Light 1.56 at the counter. It is built for long screen days and pairs well with the blinking habit above. For a same-day everyday pair, ask for Opulens Advanced 1.60 instead — in stock, ready in 20 minutes, and the pair you swap into when the lenses come out.

Every pair includes free lifetime ultrasonic cleaning, free lifetime custom fitting and adjustment, and a 1-year warranty.

If your eyes are painful, light sensitive, or your vision has changed, do not wait for an appointment slot — seek care today.