Uveitis is an inflammatory disease of the uvea, constituting the 4th leading cause of legal blindness worldwide and the 3rd leading cause of avoidable blindness . It is not a rare condition, with an incidence of 17 to 52 per 100,000 population and a prevalence of 38 to 204 per 100,000 population. In the case of cortico-dependence, it is generally accepted to propose sparing with a conventional immunosuppressant, whose efficacy is estimated at around 70%, compared with biotherapies, which are considered more effective (over 90%) but only available as 2nd-line treatment. However, there are few studies on the failure factors of this first-line treatment, such as macular thickness , gender, or vitamin D deficiency. Risk factors for flare-ups are nevertheless known, notably ethnicity, and smoking. The aim of this study is to identify risk factors for treatment failure after three months of first-line immunosuppressive therapy in patients with chronic non-infectious uveitis at Amiens-Picardie University Hospital.