By contrast to the decline of DX5+ NK cells after 7 days of culture, there was an increase in IFN-γ (Figure 2C and Table 2) and IL-6 (Figure 2D and Table 2) secretion within the groups when compared to WT mice fed with CD and the highest secretion was obtained by immune cells cultured from the gingiva of KC mice fed with HFCD. Here, IL6 is linked to keratoconus.