Subfield Mean retinal Thickness (µm) Mean ± SD
Central subfield 270.2 ± 22.5
Superior inner macula 336.0 ± 20.6
Nasal inner macula 335.0 ± 19.3
Inferior inner macula 334.9 ± 16.7
Temporal inner macula 322.6 ± 16.5
Superior outer macula 329.6 ± 16.4
Nasal outer macula 339.5 ± 16.9
Inferior outer macula 325.4 ± 16.6
Temporal outer macula 320.1 ± 15.4
Table 2: Reference value of mean retinal thickness in the nine ETDRS subfields [12].