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Eye allergies are an overreaction of your immune system to a substance. There are two types of eye allergies—seasonal and perennial: 

  • Substances in the air during specific seasons, such as pollen from grass, trees, weeds, and spores trigger seasonal allergies.  
  • Perennial allergies are immune overreactions to substances in the air year-round, such as dust mites, perfumes, animal fur, smog, smoke, etc.

Treatment

Limiting your exposure by wearing sunglasses to block contact to seasonal pollen and keeping windows closed is helpful. In the case of year-round allergies to dust mites, frequent washing of bedding and floors can lessen exposure.

Antihistamine eye drops can alleviate the itchiness and redness. In severe cases, your eye doctor may prescribe prescription eye drops. Systemic medications may be useful, too.