Retinal layer thickness on SD-OCT B-scans and histology sections through the visual streak and central ONH. All retinal thickness measurements obtained at 1, 2, 3, 4, and 6 mm ventral to the lower ONH rim in the central ONH location are presented as Boxplots. X-axes indicate the distance from the inferior edge of the ONH and Y-axes indicate the thickness of each layer/zone in µm. INL (inner nuclear layer); IR, inner retina; ONL, outer nuclear layer; OR, outer retina; PROS, photoreceptor outer segment length.