Iridocyclitis is a common complication of juvenile rheumatoid arthritis. It affects particularly female patients with mono-oligoarthritis. A positivity of ANA-test is usually observed, representing a marker for the disease. The course is chronic, leading potentially to scarring and blindness. The insidious onset, often not parallel to arthritis, requires careful ophthalmologic examination of all patients at risk, in order to achieve early diagnosis and treatment.