Fig. 2

Images of the acquisition in the left eyes of a healthy subject (a) and a glaucoma patient (b) using the peripapillary retinal nerve fibre layer (pRNFL) analysis possible with Spectralis’s optical coherence tomography Glaucoma Module Premium Edition. pRNFL is measured in three concentric circles (diameters: 3.5 mm, 4.1 mm and 4.7 mm) around the optic nerve head (green lines in the upper left infrared image in each figure). In the upper right B-scan image in each figure, pRNFL thickness at 3.5 mm diameter is measured between the red line (internal limiting membrane) and the blue line (RNFL-ganglion cell layer interphase). The lower left images in each figure show a representation of pRNFL at 3.5 mm by 6 sectors and global pRNFL thickness with a colour code (green equals within normal limits, yellow equals borderline and red equals outside normal limits). The lower right images represent pRNFL thickness at 3.5 mm in a linear graph