IFNG and uveitis: As the authors mention, “this could be due to the fact that some patients had a higher baseline expression of IFN-γ + T cells due to their disease being active and stimulation with phorbol myristate acetate failing to augment fully or any further the number of cytokine-positive T cells.” In the same way, Carreño et al. did not find significant differences in tear levels of IFN-γ between uveitis patients and healthy controls [18].