TL;DR
Seasonal allergies, like hay fever, affect the eyes of around one in four UK adults, and for many people the eye symptoms are worse than the sneezing and runny nose.
Now let’s dive in and find out what’s behind those irritated eyes and what you can do about it.
What happens to your eyes during allergy season?
When pollen lands on the surface of your eye, your immune system treats it as a threat. It releases a chemical called histamine, which triggers inflammation in the conjunctiva, the thin membrane that covers the white of your eye and lines the inside of your eyelids. This reaction is called allergic conjunctivitis, and it’s responsible for that familiar combination of itching, redness, swelling and watering.
Different types of pollen peak at different times of the year. Tree pollen tends to be highest from March to mid-May, grass pollen from mid-May through July, and weed pollen from late June into September. That means your eyes could be affected for several months depending on which pollen triggers your symptoms.
It’s worth pointing out that the pollen count tends to be higher on warm, dry, windy days. Rainy days usually bring some relief because the rain washes pollen out of the air.
Common eye symptoms to watch for during allergy season
The hallmark symptom of seasonal allergic conjunctivitis is itching. If your eyes itch but you don’t have any thick discharge or crusting, there’s a good chance allergies are the cause, not an infection. Other common symptoms include:
- Redness in one or both eyes
- Watery or slightly stringy discharge
- Swollen eyelids
- Sensitivity to light
- A gritty feeling as if something is stuck in your eye
These symptoms can range from mildly annoying to genuinely disruptive. Some people find it hard to concentrate at work, struggle to wear contact lenses or have difficulty driving when their symptoms flare up. Poor sleep is another knock-on effect, because itchy, irritated eyes can make it difficult to settle at night.
Why rubbing your eyes makes allergies worse
It’s tempting to rub your eyes when they itch, but this actually makes the problem worse. Rubbing causes your mast cells to release more histamine, which intensifies the inflammation and keeps the itch-rub cycle going.
It can also cause tiny scratches on the surface of the cornea, especially if there are pollen particles trapped under your eyelids. The best approach is to resist the urge and use a cold compress or chilled artificial tears instead.
Practical ways to reduce eye allergy symptoms
There are several straightforward steps you can take to limit how much pollen reaches your eyes during the season.
- Wearing wraparound sunglasses outdoors will create a physical barrier between your eyes and airborne pollen.
- Keeping windows closed at home and in the car, especially on high-count days, can make a noticeable difference.
- Showering and washing your hair before bed removes pollen that’s built up during the day, so it doesn’t transfer to your pillow.
If you wear contact lenses, consider switching to daily disposables during allergy season, or wearing your glasses instead. Pollen can stick to the surface of lenses and sit against your eye all day, which makes symptoms worse. Your optician will be able to advise on the best option for your situation.
Over-the-counter antihistamine eye drops are usually the first line of treatment. Mast cell stabiliser drops are another option and work well as a preventive measure if you start using them before your symptoms kick in. For moderate to severe cases, your GP can prescribe stronger drops or recommend an oral antihistamine that will help your eyes and nose at the same time.
How can allergies affect your vision?
Seasonal allergies don’t usually cause permanent damage to your eyes, but they can temporarily affect how well you see. Swollen eyelids and excess watering can blur your vision, and sensitivity to bright light may make it uncomfortable to be outside without eye protection.
In rare cases and varieties, severe or untreated allergic conjunctivitis can lead to inflammation of the cornea, which does carry a risk of vision problems. If you notice persistent blurred vision or eye pain alongside your allergy symptoms, see an optometrist or GP promptly.
Can nutrition help protect your eyes during allergy season?
While nutrition won’t stop an allergic reaction, keeping your eyes well-nourished may help them cope better with repeated inflammation. Antioxidants like lutein and zeaxanthin, which are concentrated in the retina, help protect eye tissue from oxidative damage. You’ll find them in leafy greens, eggs and brightly coloured vegetables, and they’re also available in supplement form.
A diet rich in omega-3 fatty acids from oily fish can support healthy tear production, which matters because a stable tear film helps flush allergens from the eye surface. Vitamins C and E also contribute to overall eye health by helping to manage inflammation at a cellular level.
None of this replaces proper allergy treatment, but it does give your eyes a stronger foundation to work from, especially if you deal with allergy symptoms for several months each year.
When to see a doctor for seasonal allergies
As we’ve already established, seasonal allergies very rarely send people to the doctor’s. Most cases of seasonal allergic conjunctivitis can be managed with over-the-counter treatments and some practical adjustments to your routine.
However, you should book an appointment with your optometrist or GP if your symptoms don’t improve with standard treatments, if you’re experiencing eye pain or significant changes in your vision, or if your symptoms are getting worse year on year. They can rule out other conditions and, if needed, refer you to a specialist for allergy testing or stronger treatment options.
