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Inflammation or infection of the conjunctiva is known as conjunctivitis and is characterized by dilatation of the conjunctival vessels, resulting in
redness and swelling of the conjunctiva, typically with associated discharge. The prevalence of conjunctivitis varies according to the cause, which may be influenced by the patient’s age, as
well as the season of the year.
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Viral conjunctivitis is the most common cause of infectious conjunctivitis both overall and in the adult population and is more common in
summer.
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Bacterial conjunctivitis is the second most common cause and is responsible for the majority (50%-75%) of
cases in children; it is observed more frequently from December through April.
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Allergic conjunctivitis is the most frequent cause, affecting 15% to 40% of the population and is observed more frequently in spring and
summer
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