Epidemiology

Uveitis may affect individuals of any age, sex, or geographical location without preference. Incidence and prevalence in western countries are mostly similar. In developed countries, the incidence of uveitis ranges from approximately 17 to 52 cases per 100,000 per year, while the prevalence ranges from 38 to 714 cases per 100,000.[3] In one meta-analysis, the pooled incidence of uveitis was 50.45 per 100,000, with geographical region identified as an important source of heterogeneity between studies.[4] In the US, incidence is about 15 cases per 100,000 person-years, although a study carried out in Northern California found the incidence to be higher at 52.4 cases per 100,000 person years.[5][6] The peak age of presentation of uveitis is between ages 30 and 40 years.[7][8][9]

Anterior uveitis is the most common form, accounting for at least half of uveitis cases in western countries in one review.[3] Posterior uveitis is less common, followed by intermediate uveitis.[10][3] 

Infectious uveitis is common (30%-60% of cases) in developing countries.[11] Non-infectious uveitis is more common in developed countries.[3]

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