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OBJECTIVES: This study aimed to estimate the prevalence of Herpes Zoster Ophthalmicus (HZO) and describe the sociodemographic disease distribution by age, sex, and region in Colombia using National Health Registry data between January 1, 2015, to December 31, 2019. METHODS: We conducted a cross-sectional study using the Integrated Social Protection Information System database from the Colombian Ministry of Health, the unique official database in the country. We used the specific code of the International Classification of Diseases for HZO (B02.3) from 2015-2019 to estimate the prevalence and the demographic status of the disease in Colombia. RESULTS: The average prevalence was 0.99 in 100,000 inhabitants. Females represented 54.44% of the cases from 2,378 included patients. The distribution by age has a continual increase from the quinquennial group of 55 years. The geographic analysis shows a higher disease burden in the Andean region, followed by the Caribbean and Pacific regions. CONCLUSION: This is the first study that determines the HZO epidemiological characteristics based on a National Health database in our region. We found an age distribution similar to previous studies and suggest that higher altitudes correlate with a higher burden of the disease.

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PURPOSE: To analyze the etiology, clinical characteristics, complications, treatments, and outcomes of patients with intermediate uveitis examined in a uveitis referral center in Bogotá, Colombia. PATIENTS AND METHODS: We conducted a retrospective descriptive study. We reviewed systematically the clinical records of patients attending a uveitis referral center in Bogotá, Colombia from 2013 to 2020. Data analysis included demographics, etiology, clinical characteristics, treatment modalities, best-corrected visual acuity, and complications. For categorical variables, absolute and relative frequencies were used while for continuous variables mean and standard deviations were calculated. RESULTS: We identified 18 patients with intermediate uveitis. The mean age at disease onset was 19.4 years. There was no sex predominance. Two-thirds of the patients presented bilateral involvement. The mean initial best-corrected visual acuity was 0.19 LogMAR. The most common etiology was idiopathic followed by undetermined, tuberculosis, multiple sclerosis, and juvenile idiopathic arthritis. The most common characteristics were insidious onset, chronic course, and persistent duration. The complications found were macular edema, optic disk edema, cataract, epiretinal membrane, among others. Corticosteroids and immunosuppressive therapy were the most common treatments. Mean follow-up time was 24.4 months, and the mean final best-corrected visual acuity was 0.12 LogMAR. CONCLUSION: This is the first study describing intermediate uveitis features in South America. In our context, intermediate uveitis is infrequent. Polyautoimmunity and familial autoimmunity phenomena were found in some patients. These may require a multidisciplinary approach. Ophthalmologists should promptly diagnose, treat, and refer patients with this disease to avoid common complications. Further studies are required to determine the disease relation with polyautoimmunity.