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. Author manuscript; available in PMC: 2018 Jul 1.
Published in final edited form as: Br J Ophthalmol. 2016 Nov 15;101(7):960–964. doi: 10.1136/bjophthalmol-2016-309514

Figure 2.

Figure 2

Perfusion index association with diabetic retinopathy severity groups across ETDRS zones. Macular retinal mean perfusion indices with SE bars by diabetic retinopathy severity groups: no to mild non-proliferative diabetic retinopathy (NPDR), moderate to severe non-proliferative diabetic retinopathy, proliferative diabetic retinopathy (PDR), calculated for each individual ETDRS zone. CF, central foveal; II, inner inferior; IN, inner nasal; IS, inner superior; IT, inner temporal; OI, outer inferior; ON, outer nasal, OS, outer superior; OT, outer temporal.