Progression of pre-proliferative to proliferative diabetic retinopathy: A 3-year study in the Oxford population-based diabetic retinopathy screening programme

摘要

The Early Treatment Diabetic Retinopathy Study (ETDRS) reported that there was an annual 11.3% risk of progression from severe non-proliferative diabetic retinopathy—ETDRS level 40—to proliferative diabetic retinopathy [1]. The UK National Screening Committee grade R3 as proliferative diabetic retinopathy with neovascularization on the retinal surface and/or the optic disc head. The R3 grade includes the haemorrhagic complications at the vitreoretinal interface, such as pre-retinal haemorrhage, vitreous haemorrhage and retinal detachment, which can all lead to visual loss.