It is not currently possible to prevent a person from developing an allergy. However, it is possible to prevent or reduce the frequency of allergic reactions that result from the allergy.

The most effective method of preventing an allergic reaction is to completely avoid the allergen known to trigger symptoms. There are many different triggers for allergic conjunctivitis, and patients should modify their behavior and surroundings based on which allergens provoke their allergic reactions.

Steps to avoid allergens that commonly trigger allergic conjunctivitis include:

• If pollen triggers the condition, try to stay indoors with the windows closed during periods when the pollen count is especially high (usually in the morning). Wearing eye goggles or breathing masks while mowing the lawn also can reduce exposure to pollens.
  
  
• Air conditioners and air filters can help prevent allergic conjunctivitis in those who are sensitive to dust particles. In addition, washing bedding often in at least 130 degree Fahrenheit (54 degrees Celsius) water, and using special allergen-proof covers for pillows, mattresses and box springs, can reduce exposure to dust mites.
  
  
• Avoiding close contact with animals can help those whose allergic conjunctivitis is triggered by animal dander. Cleaning a pet’s paws and fur before it enters the house can prevent allergens from getting inside.   
  
  
• Individuals who are sensitive to mold may benefit from limiting their exposure to damp areas (e.g., basements) and avoiding yard work such as mowing the lawn and raking leaves. Use of air conditioning and dehumidifiers can help prevent mold indoors. The use of humidifiers should be limited.

In addition, patients with allergic conjunctivitis may be advised to:

• Avoid wearing contact lenses or using contact lens solutions. These may make individuals more sensitive to an allergic reaction. Never share a contact lens with another person.
• Avoid wearing eye makeup. Some cosmetics contain allergens or irritants that can trigger an allergic reaction. Never share cosmetics with others.
• Avoid eye drops (unless recommended by a physician). Preservatives in these formulas sometimes can make individuals more sensitive to an allergic reaction.
• Wash their hands often with soap and water. Hands come into contact with the face often and can transfer allergens from surfaces to the eye area, triggering symptoms.
• Avoid touching their face or rubbing their eyes. These can further irritate the eyes and worsen symptoms.
• Avoid irritants, such as tobacco smoke, chalk dust and perfume. These may trigger or worsen eye-related symptoms.
• Consult a physician about whether or not allergy shots (immunotherapy) might be beneficial. This process can desensitize the patient’s body to the effects of allergens, thereby reducing the likelihood of developing allergic conjunctivitis.