The conjunctivae line your eyelids and the exposed part of your eyeball. They are part of your immune system and can become inflamed when exposed to one of your allergic triggers.
Seasonal allergic conjunctivitis is the most common and occurs in sensitive people in the presence of tree, grass, or weed pollen or outdoor mold spores.
Perennial allergic conjunctivitis is less common, but persists year round because it is related to exposure to always-present triggers such as dust mites, animal dander, insect allergens and indoor mold spores.
This topic is important to people with asthma, especially allergic asthma, because nasal allergies, skin allergies and eye allergies are all very common when you have asthma.

