Figure 2.

Scatterplots of simple linear regression between age (x-axis) and the thickness of different retinal layers (y-axis). (c: Central sub-field, Avg-O: Average thickness values from the outer ring of the ETDRS grid [composed of four subfields between 3 and 6 mm distant from the center], Avg-I: Average thickness values from the inner ring [composed of four subfields with a distance between 1 and 3 mm from the center], Total retinal thickness (TRT), 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), retina pigment epithelium (RPE), Inner retina (IR), Outer retina (OR), micrometre (µm), # indicates P < 0.05)