Assessing the Accuracy of Foveal Avascular Zone Measurements Using Optical Coherence Tomography Angiography: Segmentation and Scaling.

Assuming a nominal 3 × 3 mm scan area, we observed a slight negative trend between FAZ area and axial length computed using the semiautomatic method, though this did not reach statistical significance ( R 2 = 0.023, P = 0.10, Fig. 1A ).

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