CAT and retinal disorder: In the study, an extract of purple waxy corn and ginger combined prevented cataractogenesis and retinopathy in streptozotocin-diabetic rats by decreasing lens opacity, malondialdehyde (MDA), and AR in the lens and by enhancing catalase (CAT), and glutathione peroxidase (GPx) activities, thereby increasing the number of neurons in the ganglion cell layer and the thickness of the total retina and the retinal nuclear layer [23].