CAT and open-angle glaucoma: Increasing evidences demonstrated that reactive oxygen species (ROS), which can lead to oxidative stress, is a crucial regulator in the pathogenesis of POAG, including resistance to aqueous humour out‐flow, alteration of superoxide dismutase‐catalase and glutathione pathway activity and intraocular pressure.10 Apoptosis is also considered as a key regulator in the pathological processes of POAG.