Adalimumab Dose Adjustment for Pediatric Uveitis Treatment Trial

The goal of this clinical trial is to learn whether children and young adults with well-controlled juvenile idiopathic arthritis (JIA)-associated uveitis or chronic anterior uveitis can safely take adalimumab (or biosimilar) injections less often while maintaining control of their disease. The main question it aims to answer is: can adalimumab/biosimilar injections be given less frequently without uveitis (eye inflammation) or arthritis (joint inflammation) returning? Researchers will compare adalimumab/biosimilar injection schedules of every 2 weeks, 4 weeks, 8 weeks, and 12 weeks to determine how injection frequency affects disease control. Participants will: * Take adalimumab/biosimilar injections every 2, 4, 8, or 12 weeks. * Attend study visits every 6 weeks over 24 weeks, with an additional follow-up visit at 48 weeks for checkups, tests, and questionnaires. * Keep a diary of how often they take adalimumab/biosimilar and other drugs they take for their uveitis/arthritis.