Comparison of Individual Retinal Layer Thicknesses after Epiretinal Membrane Surgery with or without Internal Limiting Membrane Peeling

Figure 1

An example of automated retinal layer segmentation performed preoperatively on a patient with an epiretinal membrane. (a) Automated segmentation of retinal layers was performed by the built-in software of spectral domain OCT (SD-OCT; Spectralis®; Heidelberg Engineering, Heidelberg, Germany). (b) The segmentation analysis was performed within a 6-mm diameter circle centered on the fovea, as defined in the Early Treatment of Diabetic Retinopathy Study (ETDRS). The average retinal thickness in each of the 8 macular sectors was automatically calculated: retinal nerve fiber layer (RNFL), ganglion cell layer (GCL), inner plexiform layer (IPL), inner nuclear layer (INL), outer plexiform layer (OPL), outer nuclear layer (ONL), photoreceptor layer (PRL), and retinal pigment epithelium (RPE). The average retinal layer thickness at each macular sector was calculated at the 1-mm center circle, 3-mm inner ring, and 6-mm outer ring of the ETDRS.

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