There was a prevailing expression of IL-2 and IFN-γ, which are Th-1 related cytokines and their levels were significantly lower in non-uveitic individuals.39 The dominant role of T-cells in uveitis has been also reported by other studies.40,41 Subsequently, T-cells are likely to consist the main immune cells in uveitis. This evidence concerns the gene IFNG and uveitis.