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There are many people out there with pet allergies. The symptoms could range from sneezing to breathing difficulty. The immune system of allergic individuals over-react when they encounter unknown antigens (protein compounds) on the dander, saliva or urine of their pets.
Corneal ulceration is a defect in the cornea, caused by truama or dry eyes. It ranges from a superficial scratch to a full thickeness laceration, which may lead to the leakage of eye contents.