Accumulation of T cells with various cytokine profiles in the eye is thought to play a critical role in the pathogenesis of different types of chronic uveitis,24,25 and CD4/CD8 ratio of T cells infiltrating into the vitreous is elevated in ocular sarcoidosis patients compared with other uveitis patients as well as that in BAL. This evidence concerns the gene CD8A and ocular sarcoidosis.