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. 2022 Sep 11;28(12):2206–2217. doi: 10.1111/cns.13963

FIGURE 2.

FIGURE 2

The retinal OCT scan protocol. (A), The four quadrants (superior, inferior, nasal, and temporal) pRNFL thickness measurement; (B), The nine ETDRS macular subfields map (SO, SI, II, IO, TO, TI, NI, NO, F); (C), The cross‐sectional OCT image. From the internal limiting membrane to the retinal pigment epithelium, the retina was segmented into the following 10 layers: mRNFL, GCL, IPL, INL, OPL, ONL, IS/OSJ, outer segment, OPR, and RPE. OCT, optical coherence tomography; pRNFL, peripapillary retinal nerve fiber layer; ETDRS, Early Treatment Diabetic Retinopathy Study; SO, superior outer; SI, superior inner; II, inferior inner; IO, inferior outer; TO, temporal outer; TI, temporal inner; NI, nasal inner; NO, nasal outer; F, fovea; mRNFL, retinal nerve fiber layer; GCL, ganglion cell layer; IPL, inner plexiform layer; INL, inner nuclear layer; OPL, outer plexiform layer; ONL, outer nuclear layer; IS/OSJ, inner segments/outer segments junction; OPR, outer segment photoreceptor/retinal pigment epithelium junction; RPE, retinal pigment epithelium layer.