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Allergies are caused by various substances in the environment, and more special attention is required because it is likely to occur during reduced immunity or in infancy when the immune system is immature.
Typical symptoms of allergic conjunctivitis include itching and congestion of the eyes. Symptoms appear in both eyes at the same time, and sticky mucous secretion, foreign body sensation, tears, blurred vision, and glare symptoms may appear. In the case of an acute allergic attack, conjunctival congestion may be prominent, followed by severely swollen conjunctival edema with a whitish color.
Among them, vernal corner conjunctivitis, which has severe symptoms, including itching of the eyes, production of thread-like secretions and severe inflammatory reactions that may cause drooping or spasms of the eyelids. Corneal opacity accompanied by neovascularization and, in severe cases, corneal ulcers may occur, and care is needed as vision may remain permanently impaired. Atopic keratoconjunctivitis is also similar to vernal keratoconjunctivitis, and is characterized by red rashes appearing on the skin around the eyes.
Allergy refers to a series of immunological reactions showing hypersensitivity to a specific causative agent. Allergies do not occur with only one cause, but are caused by several factors, such as genetic influences, the degree of exposure to ‘allergens’, lifestyle, and environment. After initial exposure to an antigen, when a person sensitized to that antigen encounters the antigen again, basophils and mast cells with IgE (immunoglobulin E that responds to a specific antigen) react to substances (such as histamine, prostaglandins, and leukotrienes). , which causes swelling or inflammation of the surrounding tissues. This chain reaction continues to irritate and damage tissues, and these reactions can range from mild to severe.
As a genetic factor, it is known that if one parent has an allergic disease, the probability of their child suffering from an allergic disease is about 50 percent and 75 percent if both parents have an allergic disease. As environmental factors, dry air and changing seasons have a great effect. Especially in spring, the immune system overreacts to pollen or dust, which are usually harmless to the human body, and causes inflammation in the nasal passages and bronchi. Common allergy symptoms include sneezing, watery eyes, itchy eyes, runny nose, itchy skin, and rashes.
When an allergic disease is suspected, it is important to identify the causative antigen through a prompt diagnostic test and to prevent exposure to the causative substance. A representative allergen test is the MAST (Multiple Allergen Simultaneous Test) test. After blood sampling, it can be determined whether IgE is present in the serum for 108 allergens, such as animal hair, food, pollen, house dust mites, mold, and insects.
Since there is no risk in taking the test and various allergens can be identified at the same time, infants and children and patients with a wide range of skin diseases can be tested safely.
Drug therapies such as antihistamines and intranasal steroids can be applied first, but it is known that avoidance therapy to keep away from allergens is the best option for allergic diseases. This is also a strong recommendation specified in the guidelines of the Korean Academy of Asthma, Allergy and Clinical immunology.
For example, in response to fine dust and pollen, it is necessary to refrain from going out in spring when the air quality is bad, and to reduce irritation by using glasses instead of contact lenses. In the case of allergic conjunctivitis that reacts to house dust or dust mites, pay attention to ventilation and cleanliness in the house, and to wash bedding frequently. It is also helpful to frequently put eye drops in the eyes to wash away contaminants. Also, if itchiness appears, do not rub your eyes. Relieve itching with cold compresses.
Allergic conjunctivitis itself rarely causes visual impairment, but if symptoms persist it is recommended to see a doctor.
