The etiology of uveitis, choroid inflammation, is diverse, the disease is often recurrent, difficult to treat, and frequently results in disability at a young age. Studies investigating the tear fluid composition in uveitis have revealed promising biomarkers relevant for prognosis and treatment optimization. This review presents literature data on changes in the tear fluid content of proteins involved in local immune responses, intercellular interactions, proteolytic and free radical processes, nitric oxide metabolism, and other metabolic pathways in different forms of uveitis. The paper also demonstrates the significance of assessing these changes for prognosis and for a pathogenetically based, personalized treatment approach, and identifies specific alterations associated with different uveitis etiologies, offering insight into the mechanisms underlying this pathology.