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  • Can Allergies Affect Just One Eye at a Time?


    Can allergies affect just one eye but not the other?


    The simple answer is no. Typical allergies (such as hay fever) are systemic and affect both eyes. It is possible that an allergen (such as pollen or pet hair) can get in one eye and cause a temporary problem, but this is highly unlikely. If you have only one eye that is red, swollen or tearing, it is likely due to a cause other than allergy. If you have not done so already, please see an ophthalmologist.