Eye Infection or Allergies: How to Tell the Difference


As nature blooms this spring, the release of pollen marks the dreaded allergy season. 

For many contact lens wearers, it can be hard to tell the difference between your run-of-the-mill hay fever and something more serious like an eye infection. Luckily, Lens.com is here to clear the air.

In this article, we’ll discuss how to tell the difference between eye infections and allergies as well as provide tips on relieving allergy symptoms, recognizing eye infection symptoms, and best lens care practices to ensure optimal eye health.

What Are Eye Allergies?


Eye allergies, also known as allergic conjunctivitis, occur when the eyes react to allergens such as pollen, dust, or pet dander. These allergens cause the immune system to overreact, resulting in a variety of uncomfortable symptoms.


  • Itching
  • Redness
  • Watery eyes
  • Swelling
  • Burning sensation
  • Sensitivity to light

Common Triggers and Their Effects

  • Pollen – Pollen from trees, grass, and weeds can trigger allergic reactions during spring, summer, and fall.
  • Dust mites – These year-round allergens are typically found in bedding, carpets, and upholstered furniture.
  • Pet dander – Pet dander refers to the proteins found in the skin flakes, saliva, and urine of furry pets. It can trigger allergic reactions.
  • Mold spores – Mold spores thrive in damp, warm environments and can cause allergy symptoms year-round.
  • Certain medications and contact lens solutions – Some individuals may react to specific ingredients in medications and contact lens solutions.

Treatment Options for Eye Allergies

Treating eye allergies involves a combination of medications and lifestyle adjustments to manage symptoms effectively. Here are some common treatment options:

Over-the-Counter Medications

  1. Antihistamine Eye Drops – These can relieve itching and redness by blocking the action of histamines.
  2. Oral Antihistamines – Medications like Cetirizine and Loratadine help control systemic allergic reactions that affect the eyes.
  3. Decongestant Eye Drops – These reduce redness by constricting blood vessels but should be used sparingly to avoid rebound redness.

Prescription Medications

  1. Stronger Antihistamine or Anti-Inflammatory Eye Drops – Prescribed for more severe allergic reactions to reduce inflammation and discomfort.
  2. Mast Cell Stabilizers – Medications such as Olopatadine help prevent the release of chemicals that cause allergic reactions.
  3. Corticosteroid Eye Drops – Used for short-term relief under medical supervision to reduce severe inflammation.

Home Remedies and Lifestyle Changes

  1. Avoid Known Allergens – Identifying and minimizing exposure to triggers can significantly reduce symptoms.
  2. Use Air Purifiers – Air purifiers, ideally those with a  High-Efficiency Particulate Absorbing (HEPA) filter, can filter out allergens from indoor air.
  3. Keep Windows Closed – Keeping the windows closed during high pollen seasons can help reduce exposure to outdoor allergens.
  4. Apply a Cold Compress – A cold compress can soothe itchy and swollen eyes.
  5. Maintain Good Hygiene With Contact Lenses and Solutions – Proper hygiene and lens care can prevent allergic reactions.

What Are Eye Infections?


Eye infections occur when harmful microorganisms such as bacteria, viruses, or fungi invade the eye and cause inflammation and discomfort. These infections can affect various parts of the eye and may range from mild to severe.


  • Pain
  • Redness
  • Discharge (thick, yellow, green, or white)
  • Swelling
  • Blurred vision
  • Sensitivity to light
  • Tearing
  • Foreign body sensation


  • Bacteria (e.g., Staphylococcus, Streptococcus)
  • Viruses (e.g., adenovirus, herpes simplex)
  • Fungi (e.g., Fusarium, Aspergillus)
  • Parasites (e.g., Acanthamoeba)

Types of Eye Infections

  • Conjunctivitis (Pink Eye) – An infection of the conjunctiva, the thin membrane covering the white part of the eye. It can be caused by bacteria, viruses, or allergens.
  • Keratitis – An infection of the cornea, often resulting from contact lens use or eye injuries. It can be bacterial, viral, or fungal.
  • Blepharitis – An inflammation of the eyelids, often caused by bacteria or skin conditions like dandruff.
  • Endophthalmitis – A severe infection inside the eye, typically following surgery, injury, or injection.

Treatment Options for Eye Infections

Treating eye infections involves targeting the underlying cause and alleviating symptoms. Here are common treatment options:

Prescription Medications

  1. Antibiotics – Used to treat bacterial infections. These can be in the form of eye drops, ointments, or oral medications.
  2. Antiviral Drugs – Prescribed for viral infections, such as herpes simplex virus affecting the eye.
  3. Antifungal Medications – Necessary for fungal infections, which may require prolonged treatment.
  4. Steroid Eye Drops – Help reduce inflammation and are often used in combination with other medications.

Home Care Tips

  1. Apply a Warm Compress – Applying warm, moist cloths can help alleviate symptoms and clear discharge.
  2. Maintain Eye Hygiene – Keeping the eye area clean and avoiding touching the eyes can prevent the spread of infection.
  3. Avoid Contact Lens Use – Discontinuing the use of contact lenses during an infection can help prevent further irritation and spread.

Key Differences Between Eye Allergies and Eye Infections

Understanding the key differences between eye allergies and eye infections is crucial for determining the appropriate treatment and ensuring optimal eye health. Here are the main observable differences between the two:

Eye AllergiesEye Infections
Symptoms– Itching
– Redness (widespread)
– Watery eyes
– Mild swelling
– Burning sensation
– Sneezing and runny nose (systemic allergy symptoms)
– Lack of fever
– Pain
– Discharge (thick, yellow, green, or white)
– Swelling (pronounced)
– Blurred vision
– Sensitivity to light
– Fever, malaise (systemic symptoms)
Onset and Duration– Seasonal or intermittent
– Chronic, as long as exposed to allergens
– Sudden onset
– Persistent until treated
Seriousness and Complications– Generally not serious
– Manageable with treatment and avoiding triggers
– Potentially serious if untreated
– Requires prompt medical attention to prevent complications

How to Relieve Eye Allergy Symptoms and Prevent Eye Infections


Proper care and preventive measures can significantly alleviate eye allergy symptoms and reduce the risk of eye infections. Here are some effective strategies:

How to Relieve Eye Allergy Symptoms

  1. Avoid Allergens – Stay indoors during high pollen counts, keep windows closed to prevent pollen from entering your home, use air purifiers to reduce indoor allergens, and wash hands after touching pets to avoid transferring pet dander to your eyes.
  2. Use Cold Compresses – Apply cold compresses to your eyes to reduce itching and swelling. A cool, damp cloth can provide immediate relief.
  3. Take Over-the-Counter Medications – Antihistamine eye drops help relieve itching and redness, oral antihistamines alleviate systemic allergic reactions that affect the eyes, and decongestant eye drops reduce redness by constricting blood vessels. Consider using these sparingly to avoid rebound redness.
  4. Take Prescription Medications – Consult your eye doctor or general practitioner for stronger antihistamine or anti-inflammatory eye drops and medications if over-the-counter options are ineffective.
  5. Maintain Good Contact Lens Hygiene – Clean and store contact lenses as directed. Also, replace contact lenses and cases regularly to prevent allergen buildup.

How to Prevent Eye Infections

  1. Practice Good Hygiene – Wash your hands thoroughly before touching your eyes or handling contact lenses. Make sure to avoid sharing personal items like towels or makeup to prevent the spread of infections.
  2. Practice Proper Contact Lens Care – Clean and disinfect contact lenses according to the manufacturer’s instructions. Avoid wearing contact lenses while swimming or sleeping, unless specifically designed for extended wear.
  3. Replace Contact Lenses as Recommended – Never wear or use your contact lenses for longer than the prescribed time to avoid irritating surface deposit buildup.
  4. Avoid Eye Touching – Refrain from touching or rubbing your eyes to prevent transferring germs.
  5. Stay Hydrated – Drink plenty of water to maintain eye moisture and overall health.

When to See a Doctor

Seek professional medical advice if you experience:

  • Symptoms that do not improve with over-the-counter treatments
  • Severe pain, especially if it is accompanied by a headache
  • Thick, yellow, green, or white discharge from the eye
  • Sudden changes in vision, such as blurriness, double vision, or loss of vision
  • Increased sensitivity to light (photophobia)
  • Significant swelling around the eyes, particularly if it is painful or affects your vision
  • Systemic symptoms such as fever, malaise, or general illness
  • A persistent feeling of something being in your eye that is not relieved by blinking or rinsing
  • Worsening condition despite treatment
  • Discomfort, redness, or other symptoms as a contact lens wearer that do not resolve with proper lens care

Wrapping Up

Knowing the difference between eye allergies and infections is crucial for effective treatment and eye health. Eye allergies typically cause itching, redness, and watery eyes, while infections can lead to pain, discharge, and vision changes. By understanding the symptoms, seeking timely medical advice, and following preventive measures, you can manage your eye health effectively. If you experience persistent symptoms, contact an eye care professional for proper diagnosis and treatment.