Case No. 1: Multi-segmented images from a single 12 mm × 12 mm swept-source optical coherence tomography (SS-OCT) scan of an epiretinal membrane (ERM) in the right eye of a 65-year-old woman. The white square boxes centered on the fovea in panels A, B, C, and F represent a 6 mm × 6 mm field of view (FOV). (A) OCT fundus image. Notice some vessels converging to the ERM superotemporally. (B) Retinal thickness map (RTM). Note the superotemporal thickening of the retina corresponding to the ERM traction. (C) Vitreoretinal interface (VRI) en face image. The image shows a hyperreflective ERM extending from the parafoveolar to the superotemporal region. Yellow arrows in images C, D, and E are pointing to the edge of the ERM and emphasize potential traction and adherence of the ERM outside the 6 mm × 6 mm FOV. (D) B-scan corresponding to the yellow line of C outside the 6 mm × 6 mm white square. Dashed lines define the upper and lower boundaries of the VRI en face slab. (E) Magnification of the white rectangle of the image D. This demonstrates the extent of the ERM outside the 6 mm × 6 mm FOV. (F) Overlay of Panel B (60% transparency) on top of Panel C. Yellow horizontal line represents the foveal B-scan. Yellow vertical arrow highlights the extent of the ERM outside 6 mm × 6 mm FOV, whereas the yellow arrowhead indicate the presence of the ERM within the 6 mm × 6 mm FOV. (G) Foveal B-scan. Dashed lines define the upper and lower boundaries of the VRI en face slab. (H) Magnified B-scan of the white square shown in Panel G. The ERM extends from inside the 6 mm × 6 mm FOV (yellow arrowhead) to the outside 6 mm × 6 mm FOV (yellow vertical arrow).
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