Allergic Conjunctivitis: Managing Red, Itchy Eyes
- The Straits Eye Centre
- Sep 20
- 4 min read
Introduction: When Eye Allergies Disrupt Daily Life
If your eyes feel constantly red, itchy, or watery, especially during certain seasons or after exposure to dust and pets, you may have allergic conjunctivitis. Unlike infections, this condition is triggered by allergens and is not contagious.
In Singapore’s humid climate, exposure to dust mites, pollen, and air pollution makes allergic eye reactions common. With proper management, symptoms can be controlled, helping you maintain clear, comfortable vision.
What Is Allergic Conjunctivitis?
Allergic conjunctivitis occurs when the conjunctiva—the thin membrane covering the white of the eye, reacts to allergens. The body releases histamines, leading to swelling, redness, and itching.
There are two main types:
Seasonal allergic conjunctivitis (SAC): linked to pollen or environmental changes.
Perennial allergic conjunctivitis (PAC): occurs year-round, often from dust, pet dander, or mould.
Causes and Risk Factors
Pollen, dust mites, mould spores.
Pet dander (cats, dogs, birds).
Smoke, perfumes, and environmental pollutants.
Family history of allergies or asthma.
Use of contact lenses in dusty or allergen-rich environments.
Symptoms of Allergic Conjunctivitis
Itchy eyes (hallmark symptom).
Redness and swelling.
Watery or stringy discharge.
Burning sensation.
Puffy eyelids.
Sensitivity to light.
Complications if Left Untreated
Persistent discomfort affecting daily activities.
Sleep disturbances from constant itching.
Secondary infections from frequent rubbing.
In rare cases, corneal involvement leading to blurred vision.
Diagnosis
An eye specialist may use:
Patient history to identify allergen triggers.
Slit-lamp examination to check for swelling.
Allergy tests for recurrent or severe cases.
Treatment Options
Self-care and Lifestyle Adjustments
Avoid known allergens when possible.
Cold compresses for relief.
Keep indoor spaces clean and dust-free.
Use air filters in rooms.
Medical Treatments
Lubricating eye drops (artificial tears).
Antihistamine or mast-cell stabiliser eye drops.
Oral antihistamines for systemic allergy relief.
Steroid eye drops for severe cases (under close medical supervision).
Contact Lens Considerations
Switch to daily disposables during allergy season.
Avoid wearing lenses when symptoms are severe.
Prevention Tips
Shower and wash face after outdoor activities.
Wash bedding regularly to reduce dust mites.
Keep pets away from bedrooms.
Wear wraparound sunglasses outdoors to reduce pollen exposure.
Frequently Asked Questions
1. Is allergic conjunctivitis contagious?
No. Unlike viral or bacterial conjunctivitis, allergic conjunctivitis is triggered by allergens and cannot spread from person to person.
2. Can children get allergic conjunctivitis?
Yes. Children are commonly affected, especially if they have eczema, asthma, or other allergies.
3. Are antihistamine drops safe for long-term use?
Most are safe when prescribed, but prolonged steroid use for severe cases requires careful specialist monitoring.
4. Can allergic conjunctivitis cause permanent damage?
Most cases are harmless, but chronic untreated inflammation may rarely affect the cornea.
5. What’s the difference between allergic and infectious conjunctivitis?
Allergic conjunctivitis is itchy and watery, while infections often cause sticky, yellow discharge.
6. Do air purifiers help with allergic conjunctivitis?
Yes, they can reduce indoor allergens like dust and dander.
7. Should I avoid contact lenses if I have allergic conjunctivitis?
Yes, at least during flare-ups. Contacts can trap allergens on the eye’s surface.
8. How quickly do symptoms improve with treatment?
Mild symptoms may improve within days of starting antihistamine drops, but complete relief may take longer if allergens persist.
Meet Our Specialists
At The Straits Eye Centre, your vision care is in the hands of a dedicated team of experienced ophthalmologists. Each of our doctors brings unique expertise and a shared commitment to delivering thorough, patient-focused care for all ages. Whether you need advanced cataract surgery, paediatric eye management, or treatment for complex eye conditions, our team works together to provide the same attentive care we would want for our own families.
Dr Jayant V Iyer
Senior Consultant & Medical Director
Special interest: Cataract, Glaucoma, General Ophthalmology With specialist training in Singapore and the UK, Dr Jayant V Iyer has served as Head of Department at Sengkang General Hospital and Senior Consultant at Tan Tock Seng Hospital. He is committed to delivering safe, precise surgical care with clear communication at every stage.
Dr Jason Lee
Senior Consultant & Medical Director
Special interest: Oculoplastics, General Ophthalmology, Myopia, Cataract, Diabetic Retinopathy Dr Jason Lee has extensive training in eyelid, orbital, and tear system surgery, with fellowships completed in Taiwan and China. Previously a Senior Consultant at Khoo Teck Puat Hospital, he co-founded The Vision Mission, a non-profit bringing sustainable eye care to communities in Asia.
Cost, Medisave, and Insurance
Many procedures at The Straits Eye Centre are eligible for Medisave claims under MOH guidelines, and certain insurance plans may cover part or all of your treatment costs. Our patient care team will guide you through eligibility, claim limits, and paperwork, so you can focus on your recovery. For more details, refer to our Medisave & Insurance Guide.
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