IL13 and keratoconjunctivitis: However, ILC2, like T cells (Th2 cells), may play a role in keratoconjunctivitis in IL33tg mice, as ILC2 can produce massive IL-5 and IL-13 in response to the stimulation of IL-334, and those Th2 cytokines are produced by ILC2 in the corneas of IL33tg mice (Supplementary Fig. 2).