Figure 1.

Representative OCT B-scans of a patient with GA. Enhanced depth imaging OCT B-scan (left) through the fovea were investigated at the baseline, 6-month, and 12-month follow-up visits. A magnified visualization of the investigated area is reported on the right. In detail, three regions were investigated: (i) GA region (highlighted in red), (ii) a 150-µm-wide border around the GA (highlighted in orange), and (iii) an area beyond the border (highlighted in green). In the GA region, all identifiable outer choroidal vessels (defined by oval shape with hyperreflective margins and hyporeflective contents) were selected and measured using ImageJ. Along the ring surrounding the GA border, the first visible vessel moving outward from the GA region was chosen and measured. In the area beyond the border region, the first visible vessel from the outer edge of the ring was identified and analyzed.