IL2 and proliferative vitreoretinopathy: The expression level of IL‐2 has been found to be highly expressed in the aqueous humour of polypoidal choroidal vasculopathy (PCV) and proliferative vitreoretinopathy (PVR) patients (Ricker et al., 2011; Roybal et al., 2018; Sakurada et al., 2015).