Figure 3
Sample case of outer-wall shift to nasal side (left eye of 47-year-old man with glaucoma, axial length of 26.68 mm). (A) Disc photograph. The arrowhead indicates the location of the central retinal vascular trunk (CRVT). The dotted lines indicate the location of the OCT scan. (B) Infrared images. (B1) Bruch’s membrane opening (BMO, red dots), anterior scleral opening (ASCO, blue dots), CRVT position (yellow dot), and meridian of longest externally oblique border (EOB, black dot) are marked. (B2) Best-fitted ellipses for BMO (orange ellipse) and ASCO (purple ellipse) are drawn with their centers (orange dot for BMO center, purple dot for ASCO center). (C) B-scan OCT images (top row: original images, bottom row: images with labels). The red dots indicate the BMO margin; the blue dots indicate the ASCO margin; the green lines indicate the anterior scleral surface; the arrowhead indicates the CRVT. On the nasal side, the ASCO margin cannot be drawn (C1, C2, question mark). The ASCO margin can be drawn on the adjacent scan (C3). Since the indiscernible angle is larger than 30° on the nasal side, this eye is classified as incomplete demarcation for ASCO and grouped accordingly. Despite the incomplete ASCO demarcation, the best-fitted ellipse could be fitted, and the boundary according to the fitting is marked by the purple dotted lines (C1, C2). Please note that both the CRVT and ASCO offsets are headed nasally, while the extent is larger for the CRVT offset than for the ASCO offset.
