CXCL8 and uveitis: Using multi-plex cytokine assays, pro-inflammatory cytokines including GM-CSF, IL-6, IL-8, TNF-a, IFN-g and IL-4 were assessed because of their known association with intra-ocular inflammation [13–15] as well as the immune regulatory cytokines including IL-2, IL-4 and IL-10 were assessed because of their known role in regulation of uveitis and sympathetic ophthalmitis [14, 15].