Fig 1.

(a) The software of optical coherence tomography angiography (OCTA) divided the macula into the fovea, parafovea, and perifovea. The foveal, parafoveal, and perifoveal regions were defined as a circle of 1 mm, 3 mm and 6 mm respectively. Ganglion cell complex (GCC) scan was measured within a circular macular area (6 mm in diameter) that was centered 1 mm temporal to the fovea. (b) The retinal structure showed in OCTA. The inner retina was bounded from the inner limiting membrane (ILM) to the inner plexiform layer (IPL). (NFL: Nerve fiber layer; INL: Inner nuclear layer; OPL: Outer plexiform layer; ISOS: Inner segment / outer segment of photoreceptor; RPE: Retinal pigment epithelium; BRM: Bruch’s membrane) (c) The foveal avascular zone (FAZ) was the area inside the inner circle, which was automatically defined by OCTA.