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When it comes to diabetic patients, persistent hyperglycemia and associated pathological conditions will not only cause diabetic retinopathy(DR)but also have an impact on the metabolism of vitreous, leading to diabetic vitreopathy. Owing to the adjacent anatomical position between the vitreous and retina, diabetic vitreopathy and DR are mutually promoted. Changes in vitreoretinal interface such as posterior vitreous detachment(PVD)and vitreoschisis, provide a scaffold for fibrovascular proliferative membrane and are closely associated with pars plana vitrectomy(PPV). This article sorts out the variation of diabetic patients' vitreous structure and biochemical components, along with the changes in the vitreous-retinal interface, particularly for the related research on its relationship with proliferative diabetic retinopathy(PDR), aiming at providing further cognition of diabetic vitreopathy as well as references for DR treatment and formulation of PPV.