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The most complex and common cause for various red eye symptoms is an allergy. People may become allergic to almost anything but red eye symptoms are generally caused by allergic reactions to microscopic mite, a microorganism that lives in hair follicles. Also, eyes have a broad surface area thus becoming the perfect place for collecting various airborne allergens that may trigger a wide range of adverse reactions that may be limited solely to these particular ocular tissues. An eye allergy affects the thin tissues that form the white part of the eyes. Also, the eye lids will be affected. The white thin issues are the ones that act as a genuine barrier that protects your eyes from microbes, invading particles and other debris. Tear glands can also be involved in ocular allergies beacuse they aren’t made up of water only. Tears contain some very important immune defense substances and soon after a particular airborne allergen collides with the surface of your eyes, you may experience allergic reactions that is kicked off in your conjunctiva – these allergic reactions will cause swelling, red color and burning and itching. Once your eyes become irritated by direct contact with per dander or pollen, your tear glands will try their best in order to flush all the offensive allergens from your eyes. Their attempt to get rid of irritants will cause your eyes to become flooded with tears. Your body will try to protect you from such airborne allergens but it will also make you feel quite miserable along the process. Eye allergies are similar to other types of allergies – for instance, the tissues that form all the allergy sensitive surfaces of your eyes are similar to the ones that make up the areas from your throat and nose that are sensitive to allergies as well. Also, an eye allergy may co-exist with different allergic conditions that include eczema and hay fever. But the biggest difference between an eye allergy and the rest of allergies is the way a particular allergen comes in direct contact with you. There are several ways an airborne allergen may find its way right into your eyes. For instance, an airborne allergy may enter your eyes as soon as you walk into a particular area that has the source of that allergen located in. Also, your eyes may come into contact with an allergen as soon as you start touching or rubbing the areas around the eyes with your hands. For instance, rubbing your eyes soon after they start burning will help the allergen get spread to the whole eye area. People who develop eye allergies are very likely to have a personal or family history of allergies and they are going to experience eye allergy symptoms before the age of 25-30. Photo - Flickr, http://www.flickr.com/photos/grumpychris/436320528/
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