Retina TodayThe Value of OCTA in Retinal Vascular Disease

ℹ️ Observational Association Only Evidence

OCT angiography (OCTA) detects subclinical retinal and choroidal blood flow changes across diabetic retinopathy, AMD, and central serous retinopathy. This review covers established qualitative applications alongside emerging quantitative flow measurement techniques that remain research-only.

Clinical Considerations

• Capillary flow deficits appear in patients with diabetes before clinical retinopathy and correlate with progression to vision-threatening stages.
• Reduced choriocapillaris perfusion predicts faster geographic atrophy enlargement and identifies macular neovascularization before clinical exudation in AMD.
• Choroidal hyperperfusion characterizes acute CSR, and persistent hyperperfusion is associated with chronicity and higher recurrence risk.
• Inter-device variability and absent normative databases prevent standardized cutoffs and limit cross-platform comparison of quantitative flow metrics.

Practice Applications

• Recognize OCTA’s qualitative utility for capillary-level assessment across DR, AMD, and CSR.
• Interpret commercial OCTA output as qualitative; quantitative velocimetry remains research-only and not FDA-cleared.
• Monitor MNV perfusion changes alongside structural OCT during anti-VEGF treatment in wet AMD.
• Avoid extrapolating findings across OCTA devices given platform variability and absent normative data.

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