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. 2015 May;21(6):678–688. doi: 10.1177/1352458514567216

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© The Author(s), 2015

This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 3.0 License (http://www.creativecommons.org/licenses/by-nc/3.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access page (http://www.uk.sagepub.com/aboutus/openaccess.htm).

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Figure 1. — Retinal parameters acquired by OCT.

(a) Fundus image showing the acquisition of the peripapillary RNFL thickness. OCT records a ring scan of 3.4 mm diameter around the optic nerve head, which is divided into quadrants. (b) The total macular volume is derived from a volume scan and contains all retinal layers in a 6 mm diameter cylinder around the fovea centralis. (c) Intra-retinal layer segmentation in a spectral domain OCT image. (d) MME in a patient with optic neuritis. MME locations are marked by yellow arrows.

OCT: optical coherence tomography; RNFL: retinal nerve fiber layer; S: superior; N: nasal; I: inferior; T: temporal; TMV: total macular volume; GCL; ganglion cell layer; IPL: inner plexiform layer; INL: inner nuclear layer; OPL: outer plexiform layer; ONL: outer nuclear layer; ELM: external limiting membrane; IS/OS: inner segments/outer segments of the photoreceptor layer; RPE: retinal pigment epithelium; MME: microcystic macular edema.