Macular vessel density in diabetes and diabetic retinopathy with swept-source optical coherence tomography angiography.

Purpose: Previous studies on the association between macular vessel density (VD) and diabetic retinopathy had conflicting conclusions. This study assessed the alterations of macular VD, as well as other factors, in diabetic patients using swept-source optical coherence tomography angiography (SS-OCTA) in a large-scale sample from Chinese communities.

Methods: Patients with type 2 diabetes without history of ocular treatment were recruited from 2017 to 2018.