摘要
Changes in the area,perimeter,and circularity index of the foveal avascular zone(FAZ)can be influenced by the filling or occlusion of tiny capillaries surrounding it.In diabetic retinopathy(DR),FAZ-related indicators can provide a quantitative assessment of early DR,predict early disease changes,and offer a theoretical basis for monitoring disease progression and evaluating patients’visual outcomes.Therefore,finding a simple and noninvasive method to visualize the FAZ has become a research hotspot in ophthalmology.The emergence of optical coherence tomography angiography(OCTA)has filled the technological gap in FAZ measurement.This article reviews the basic principles of OCTA and the clinical application of OCTA-measured FAZ-related indicators in DR,aiming to improve the diagnosis and treatment of DR.
