1. Optical coherence tomography angiography avascular area association with one-year treatment requirement and disease progression in diabetic retinopathy

    Optical coherence tomography angiography avascular area association with one-year treatment requirement and disease progression in diabetic retinopathy

    Purpose To assess the association between optical coherence tomography angiography (OCTA) quantified avascular areas (AA) and diabetic retinopathy (DR) severity, progression and treatment requirement in the following year. Design Prospective cohort study. Methods We recruited diabetic patients from tertiary academic retina practice and obtained 3x3-mm macular OCTA scans with AngioVue system and standard 7-field color photographs at baseline and 1-year visit. A masked grader determined the DR severity from the color photographs using the Early Treatment of Diabetic Retinopathy (ETDRS) scale. A custom algorithm detected extrafoveal AA (EAA) excluding the central 1mm circle in projection-resolved superficial vascular complex (SVC), intermediate ...

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