Allergies are common causes of eye irritation and redness. Avoidance of the cause of the allergy, also known as the allergen, is helpful in treatment of this condition. But despite the best efforts to avoid allergens, people sometimes need treatment. Treatment usually consists of anti-allergy eye drops. There are several good anti-allergy eye drops available without a prescription, but sometimes a prescription eye drop is needed.
To learn more about allergies and the eye, please click here: http://www.geteyesmart.org/eyesmart/diseases/allergies.cfm