MPO and keratoconus: MPO-DNA complexes (r = 0.5428, p = 0.001), cell-free DNA (r = 0.3573, p = 0.0526), and IL-8 (r = 0.4831, p = 0.0069) show a moderately strong positive correlation with histopathological scores, while KC demonstrate a weaker positive correlation (r = 0.3329, p = 0.0723) (Figure 5A–D).