Comparison of Two Different OCT Systems: Retina Layer Segmentation and Impact on Structure-Function Analysis in Glaucoma

Figure 2

(a) This plot shows the measurements from both OCTs per patient: (left) total macula thickness; (right) ganglion cell-inner plexiform layer thickness. Comparison between these measurements allows visual appreciation of the difference per patient. (b) Respective Bland-Altman graphic representation comparing the difference between Cirrus and Spectralis MT (right) and GCIPL (left) to their mean. Auto: values using automatic segmentation in Spectralis; corrected: values after manual correction of retinal layer segmentation in Spectralis; mGCIPL: minimum GCIPL value calculated by Cirrus software. POAG: primary open angle glaucoma group; controls: control group.

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