Allergic conjunctivitis or ocular allergy occurs when something you are allergic to irritates the conjunctiva. This is a delicate membrane that covers the eye and the inside of the eyelid. Allergic conjunctivitis refers to eye inflammation resulting from an allergic reaction to an allergen substance.
Allergic conjunctivitis starts when the immune system identifies an otherwise harmless substance as an allergen. This causes your immune system to overreact and produce antibodies called Immunoglobulin (IgE). These antibodies travel to mast cells and induce them to release chemicals called histamine, which translates to an allergic reaction. In this case, allergic reactions include eyes that water, itch, hurt or become red and swollen.
You experience allergic conjunctivitis when your body tries to defend itself against a perceived threat. Some of the substances that cause a reaction are:
Red, itchy, watery, and burning eyes are common symptoms of allergic conjunctivitis. You may also wake up in the morning with puffy eyes. These symptoms can occur alone or along with allergic rhinitis nasal symptoms. They typically appear shortly after exposure to the allergen.
Your doctor will examine your eyes and review your allergy history. Redness in the white of the eye and small bumps inside your eyelids are visible signs of conjunctivitis. Your doctor may also order one of the following tests:
Treating allergic conjunctivitis at home involves a combination of prevention strategies and activities to ease your symptoms. To minimize your exposure to allergens:
In more troublesome cases, home care may not be adequate. You will need to see a doctor who might recommend:
Completely avoiding the environmental factors that cause allergic conjunctivitis can be difficult. The best thing you can do is to limit your exposure to these triggers. For example, if you know that you are allergic to perfume or household dust, you can try to minimize your exposure by using scent-free soaps and detergents, or by installing an air purifier in the home.