We demonstrated that OCTA can identify preclinical DR before the manifestation of clinically apparent retinopathy in diabetic eyes. DM2 patients without DR have SCP, DCP and choriocapillaris impairment. Our results suggested that OCTA might be a promising tool for regular screening of diabetic eyes for DR.
ONH perfusion and peripapillary RNFL thickness were significantly decreased in preclinical DR patients compared to normal controls. Microvascular alterations in ONH may occur earlier than peripapillary RNFL defect in the course of DR.
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