How Does Hay Fever Affect Your Eyes?

Seasonal pollen allergies, colloquially known as “hay fever”, affect millions of people (up to 25% of the adult population) each year, usually between mid-May and July.

An old wives’ tale claimed that the smell of hay caused “hay fever,” giving the condition its name. Today, we know airborne pollen from grass, trees, and weeds triggers an allergic reaction when it comes into contact with our eyes, nose, and throat. This common condition can cause a variety of symptoms that affect our daily lives and significantly impact vision and eye health.

This guide explains common eye-related hay fever symptoms, how they affect vision, and how to manage them while protecting your eye health.

 

What Is Hay Fever?

Hay fever, also known as allergic rhinitis, is an allergic reaction that occurs when the immune system overreacts to allergens present in the air. Common triggers include pollen, house dust mites, mould spores, and pet dander.

When a person with hay fever comes into contact with these allergens, their immune system releases histamine and other chemicals, causing symptoms such as sneezing, a runny or stuffy nose, itchy or watery eyes, an itchy throat or ears, coughing, and fatigue.

 

Types Of Hay Fever

Hay fever, or allergic rhinitis, is often categorised into two main categories: seasonal and perennial.

Seasonal Hay Fever

Seasonal hay fever typically occurs during specific times of the year and is associated with seasonal allergens such as pollen from trees, grasses, or weeds. Symptoms tend to manifest during seasons when these allergens are prevalent in the air.

Common characteristics of seasonal hay fever include:

• Symptoms are triggered by outdoor allergens
• Symptoms occur during specific seasons
• Allergens like tree pollen in the spring, grass pollen in the summer, or weed pollen in the autumn may cause symptoms
• Symptoms often include sneezing, a runny or stuffy nose, itchy/watery eyes, and itching in the throat or ears.

Perennial Hay Fever

Perennial hay fever refers to year-round symptoms that occur regardless of the season. This type of hay fever is usually caused by indoor allergens, such as dust mites, pet dander, and mould spores.

Common characteristics of perennial hay fever include:

• Symptoms persist throughout the year
• Indoor allergens like dust mites, pet dander, mould, or cockroach droppings are the primary cause
• Symptoms may include persistent sneezing, nasal congestion, itchy/watery eyes, and coughing

 

What Are the Most Common Eye-Related Hay Fever Symptoms?

One of the most common eye-related hay fever symptoms is redness, which can cause discomfort and make the eyes appear bloodshot. Itchiness, watering, and swelling are also common hay fever symptoms that can cause significant discomfort. Hay fever sufferers may also experience light sensitivity, making it difficult to see clearly in bright environments.

In addition to these uncomfortable symptoms, hay fever can also have a direct impact on vision, including:

• Blurred Vision: Inflammation and swelling in the eyes can cause vision to become blurry.
• Double Vision: Allergies can weaken the eye muscles, leading to double vision.
• Eye Fatigue: Constant rubbing and itching of the eyes can cause eye fatigue and strain.
• Decreased Visual Acuity: In severe cases, hay fever can cause decreased visual acuity or, in very rare cases, temporary vision loss

The effects on vision from hay fever can be particularly frustrating, making it challenging to carry out daily tasks such as reading or driving, and they can persist even after the symptoms have subsided. Hay fever also exacerbates other inflammatory conditions such as eczema, dermatitis, and asthma.

Do your eyes feel itchy or gritty? It might not be caused by hay fever, but by dry eye syndrome. You can read our full guide on dry eye syndrome here.

Swollen Eyes and Hay Fever

Swelling is one of the most noticeable and most searched-for hay fever eye symptoms. It happens when histamine causes fluid buildup in the delicate tissue around the eyes, leaving the eyelids puffy and sometimes making the whites of the eyes look raised or bulging (a condition called chemosis). Swelling can appear suddenly, often after a burst of high pollen count, and tends to be worse first thing in the morning after lying down all night.

Cool compresses, keeping hands away from the eyes, and antihistamine (anti-allergy) eye drops are usually the quickest way to bring swelling down. If one eye swells noticeably more than the other, or the swelling doesn’t ease within a day or two, it’s worth having it checked, as this pattern can occasionally point to something other than hay fever.

Sore Eyes and Hay Fever

Alongside itching, many hay fever sufferers describe their eyes as feeling sore, gritty, or as though something is stuck under the eyelid. This soreness comes from the same allergic response that causes redness and swelling; the surface of the eye becomes inflamed and more sensitive, so blinking, wearing contact lenses, or spending long hours on a screen can feel more uncomfortable than usual during pollen season.

Lubricating eye drops (separate from antihistamine eye drops) can help by keeping the eye surface comfortable, and taking regular screen breaks reduces additional strain on already irritated eyes.

Dry Eyes and Hay Fever

It might seem contradictory, but hay fever can cause both watery and dry eyes, sometimes at the same time. The allergic reaction disrupts the normal tear film that keeps the eye surface lubricated, and excessive rubbing (a common response to itching) can further strip away natural moisture, leaving eyes feeling dry, tight, or gritty between bouts of watering.

Preservative-free lubricating eye drops used little and often are usually more effective here than trying to power through, and are gentle enough to use alongside any antihistamine treatment.

Puffy and Gunky Eyes

A buildup of discharge or eyes that feel “gunky” or sticky, especially on waking, is another common complaint during hay fever season. This is the eye’s own response to irritation – producing extra mucus and tears to try and flush out the pollen – and is usually more of a nuisance than a concern. Gently cleaning the eyelids with a clean, damp cotton pad (wiping outwards away from the nose) and using cooled artificial tears can help keep this manageable.

 

What Is Allergic Conjunctivitis?

Allergic conjunctivitis, or allergic eye disease, is the itching, burning, watering, and redness of the eye, and puffiness of the eyelids caused by exposure to an allergen. This can be seasonal or year-round (perennial).

For most of those affected seasonally, these symptoms are part of their hay fever. Grass or other pollen lands on the eye surface and triggers the release of histamine and other substances, which cause the symptoms.

The cornea is not affected at all, and the surrounding white of the eye is only slightly affected. The part of your eye not directly visible is where the reaction mainly occurs. With allergic conjunctivitis, the insides of the eyelids experience slight redness (hyperaemia), slight swelling (oedema), and sometimes little bumps (papillary hyperplasia).

Other symptoms include:

• Both eyes are usually affected and symptoms develop quickly
• The skin on the inside of the eyelids looks red and sore
• A burning feeling may occur, although the eyes are not usually painful
• The eyelids tend to swell

 

You can find our full guide on conjunctivitis here.

 

Can Hay Fever Affect Only One Eye?

Hay fever is systemic and typically affects both eyes at once, so if you experience irritation in just one eye, hay fever is unlikely to be the cause.

A bacterial, viral, or fungal infection, or an irritant like cigarette smoke or chlorine, can cause swelling or itchiness in one eye. If irritation in one eye persists for more than 1-2 days, it’s advisable to speak with your optometrist.

 

How To Manage Hay Fever Symptoms

Avoiding allergens is the first step in managing hay fever symptoms, especially during the pollen season, which peaks from mid-May through July.

Keeping windows and doors closed and using air conditioning to filter the air can help reduce allergen exposure and reduce hay fever symptoms. Barrier methods, such as glasses, sunglasses (especially wraparound sunglasses), and contact lenses, can decrease the amount of pollen that comes into contact with the eyes. Additionally, applying petroleum jelly around the inside of the nostrils or using nose plugs can prevent pollen grains from entering the nose.

Using a soothing mask can cool the face, providing relief to the eyes affected by hay fever. Contact lens wearers can reduce pollen buildup by using daily lenses instead of monthly ones. Avoid rubbing the eyes, even if they are itchy, as this can exacerbate hay fever symptoms.

Medications prescribed by a doctor or optometrist can also alleviate hay fever symptoms. Medicinal treatments include anti-allergy (anti-histamine) tablets, which are taken daily to prevent the allergic reaction that causes hay fever. Other options include nasal sprays, which can help relieve a blocked nose quickly, and anti-allergy eye drops can soothe hay fever symptoms such as soreness, itchiness, and dryness.

There are various over-the-counter and prescription eye drops and medications available, but it is essential to talk to your doctor or optometrist about the best options for you. Please note that if you wear contact lenses, some anti-allergy eye drops should not be used with them.

 

You can find our full guide to using eye drops here.

 

Hay Fever and Contact Lenses

Contact lens wearers often find hay fever season particularly tricky. Pollen can stick to the surface of the lens, prolonging contact with the eye and making irritation worse, while increased tear production can make lenses feel loose or uncomfortable. A few adjustments can help:

• Switching to daily disposable lenses during peak season means starting with a completely clean lens every day.
• Wearing glasses instead of lenses on very high pollen days reduces direct contact between pollen and the eye altogether.
• Always check that any eye drops used are contact lens compatible; some antihistamine (anti-allergy) drops aren’t suitable for wear with lenses in.
• Wash hands thoroughly before handling lenses, as pollen can transfer easily from finger to lens surface.

If you find yourself regularly struggling with lenses during hay fever season, it’s worth having a chat with your optometrist about alternatives that suit you better at this time of year.

 

When To Seek Professional Advice For Hay Fever

If your hay fever symptoms persist despite these measures, it’s important to seek professional advice and treatment. An eye care professional can help diagnose and treat any underlying eye conditions and recommend treatment options for managing eye-related hay fever symptoms.

Hay fever can cause a range of uncomfortable symptoms that impact vision and eye health. By taking steps to avoid allergens, using prescribed medications, maintaining good eye hygiene, and seeking professional advice and treatment, you can manage your hay fever symptoms and protect your eye health.