Red, Itchy, Watering Eyes in Delhi's Smog: What Helps and When to See a Doctor

Why Does Delhi's Smog Irritate the Eyes?

The front of your eye is covered by a thin layer of tears, called the tear film. It keeps the surface smooth, moist and comfortable.

In smog, tiny particles of smoke, dust and vehicle exhaust land on this surface. They can disturb the tear film and irritate the conjunctiva, the thin, clear layer that covers the white of the eye.

The eye then reacts in a few ways. Small blood vessels widen, so the eye looks red. It makes extra tears to wash the particles out, so it waters. And it may itch, burn or feel gritty, as if there is sand in it.

Indoors, dry air from heaters and long hours on screens can add to this, because we blink less when we concentrate on a screen.

Is It Pollution, Allergy, Eye Flu or Dry Eye?

These four can look alike. The table below shows the usual pattern, but they often overlap, and only an eye examination can tell for sure.

Pollution can also set off an allergy or make dry eye worse, so you may have more than one at the same time. Thick yellow or green discharge is not typical of any of these four and can be a sign of a bacterial infection, which needs an eye doctor.

What Helps at Home

For mild redness and itching with no warning signs (see the list further down), these simple steps usually help:

• Rinse or splash. When you come in from outside, splash your closed eyes, or gently rinse them, with clean, cool water.
• Cold compress. Hold a clean cloth soaked in cold water over your closed eyes for a few minutes. It can ease itching and puffiness. Use a fresh cloth each time.
• Protect your eyes outdoors. Wear sunglasses or wraparound glasses outside, especially on a two-wheeler, in an auto, or when walking along busy roads.
• Don't rub. Rubbing spreads the particles around and makes itching and redness worse. It can also carry germs from your hands into the eye.
• Lubricating eye drops. These can help rinse out particles and soothe the surface of the eye. Use any preservative-free lubricating drops.
• Contact lenses. If you wear contact lenses, switch to glasses on bad-air days.
• Check the AQI (Air Quality Index). On high-AQI days, spend less time outdoors and keep windows closed when the air is at its worst.
• Screen breaks and blinking. Every 20 minutes, look at something far away for about 20 seconds and blink fully a few times.
• Drink enough water. Staying well hydrated helps your overall comfort, including your eyes.

What Not to Do

• Don't use steroid drops, or leftover or borrowed drops, without a prescription. Some drops can make certain infections worse or raise the pressure inside the eye, so use them only if an eye doctor prescribes them for this problem.
• Don't share towels, pillows, eye make-up or eye drops if it could be eye flu. Wash your hands often and try not to touch your eyes.
• Don't wear contact lenses while your eye is red or sore.
• Don't put rose water or any home remedy in your eyes. Their pH is very different from that of your natural tears, so they should never go into the eye.

When to See an Eye Doctor

See an eye doctor if you have any of these:

• Eye pain, not just itching or mild grittiness
• Blurred or reduced vision that doesn't clear when you blink
• Sensitivity to light
• Thick yellow or green discharge
• Redness or irritation with no improvement after 2 days of home care and lubricating drops
• A red, painful eye in a contact lens wearer. This is urgent: take the lenses out and see an eye doctor the same day.
• A child with a red eye plus discharge or eyelid swelling
• Any injury to the eye, or any chemical splashed into it. This is urgent: rinse with plenty of clean water straight away, then see an eye doctor.

If you need help outside clinic hours: go to the nearest hospital emergency department.

How Dr. Neha Chandrakar Can Help

At her clinic in Greater Kailash-1, Dr. Neha Chandrakar asks about your symptoms, screen time, contact lens use and any allergies. Then she examines your eyes.

The examination may include:

• A slit-lamp examination: a microscope with a bright light that gives a magnified view of the front of the eye.
• A tear film / dry eye assessment: to see how well your tears protect the surface of the eye.

She then explains what is causing the problem and the plan for it: prescription anti-allergy drops, lubricating drops or dry eye treatment.

If dry eye is part of the picture, see dry eye treatment in Delhi. For children, see our pediatric eye specialist in South Delhi page. For a routine check, see eye specialist in South Delhi, or find the clinic on our contact page.

A Note for Diwali

Smoke from firecrackers around Diwali (8 November) can make all of this worse. Wear glasses outdoors, keep children at a safe distance from crackers, and keep windows closed on smoky nights.

Frequently Asked Questions

Can air pollution cause an eye infection?

Pollution itself usually causes irritation rather than infection. But irritated eyes get rubbed more, and rubbing with unwashed hands can carry germs into the eye. If you notice thick yellow or green discharge, pain or blurred vision, see an eye doctor.

Is eye flu contagious, and how long does it last?

Yes. Eye flu (viral conjunctivitis) spreads easily through hands, towels and shared items. It usually settles by itself in about 1 to 2 weeks. Wash your hands often, don't share towels or drops, and stay home from school or work until the redness and discharge have stopped. An eye doctor can confirm that it is eye flu and not something that needs other treatment.

Which eye drops are safe for pollution irritation?

Lubricating eye drops are usually used to soothe mild pollution irritation. Use any preservative-free lubricating drops. Don't use steroid drops or leftover drops without a prescription. If your eyes don't improve in 2 days, see an eye doctor.

Can I wear contact lenses in smog?

If you wear contact lenses, switch to glasses on bad-air days. Never wear lenses while your eye is red or sore. If you have a red, painful eye while using lenses, take them out and see an eye doctor the same day.

Are children's eyes more affected by pollution?

Children often spend more time playing outdoors, rub their eyes more, and may not be able to explain what they feel, so irritation can be missed. Watch for rubbing, watering, redness or blinking a lot. If your child has a red eye with discharge or eyelid swelling, see an eye doctor.

Do air purifiers help with eye irritation?

An air purifier may make your eyes more comfortable indoors, because it can reduce smoke and dust particles in the room where it runs, with doors and windows closed. It does not help outdoors, and it does not treat an infection, an allergy or dry eye. If your symptoms continue, see an eye doctor.

Medically reviewed by Dr. Neha Chandrakar, MBBS, DNB (Ophthalmology), FAICO, 8 Oct 2026