Figure 1

Example of the topographical analysis of DH in this study. (A) DH was divided into three types based on proximal location and morphology: (1) parapapillary hemorrhage located outside of the papilla; (2) located in the neuroretinal rim region; (3) peripapillary hemorrhage located in the neuroretinal rim and parapapillary region. (B) Red-free fundus photography to evaluate topographic relationship between DH and RNFLD. (a) DH at healthy RNFL; (b) DH at the border between RNFLD and healthy-looking RNFL; (c) DH in the region where RNFLD was present. (C) To measure the angular extent of DH, two lines (a and b) were drawn from the disc center to points at which the DH border met the disc. (D) To divide the position of DH by octant, we drew a reference line from the center of the optic disc to the center of the macula. We plotted a vertical line to the reference line and then drew two lines bisecting the divided quadrants to make eight quadrants. a, superotemporal-superior; b, superotemporal-inferior; c, inferotemporal-superior; d, inferotemporal-inferior; e, inferonasal-inferior; f, inferonasal-superior; g, superonasal-inferior; h, superonasal-superior. DH disc hemorrhage, RNFL retinal nerve fiber layer, RNFLD retinal nerve fiber layer defect.