Editing Diabetic retinopathy (section)

==Epidemiology==
Around 35% of people with diabetes have some kind of diabetic retinopathy; around 10% experience some degree of vision loss.{{sfn|Vujosevic|Aldington|Silva|Hernández|2020|loc="Introduction"}} Diabetic retinopathy is particularly common in those with type 1 diabetes – affecting 25% of people five years from diagnosis, 60% 10 years from diagnosis, and 80% 15 years from diagnosis.{{sfn|Brownlee|Aiello|Sun|Cooper|2020|loc="Epidemiology and Impact of Proliferative Diabetic Retinopathy and Diabetic Macular Edema"}} Chances of disease progression are heavily influenced by blood sugar control, but on average 7% of those with diabetes experiencing proliferative diabetic retinopathy and 7% diabetic macular edema.{{sfn|Vujosevic|Aldington|Silva|Hernández|2020|loc="Introduction"}} Diabetic retinopathy is the leading cause of vision loss in those 20–74 years old.{{sfn|Vujosevic|Aldington|Silva|Hernández|2020|loc="Introduction"}}

The global burden of diabetic retinopathy increased dramatically from 1990 to 2015—from 1.4 million to 2.6 million people with visual impairment; from 0.2 million to 0.4 million blinded—due in large part to the increasing burden of type 2 diabetes in low- and middle-income countries.{{sfn|Vujosevic|Aldington|Silva|Hernández|2020|loc="Introduction"}}