File:Figure 5 ETDRS standard photos for diabetic macular ischemia.jpg

Figure 5: ETDRS standard photos for diabetic macular ischemia. A: Standard photograph 1A (left eye). The central and inner nasal subfield provides the lower boundary for grade 3 (moderate, M) capillary loss. B: Standard photograph 2 (left eye). The central and inner temporal subfields provide the lower boundary for grade 4 (severe, S) capillary loss. In the central subfield, the few capillaries that remain represent 10 to 25% of the number that might be expected. Reprinted from: Classification of diabetic retinopathy from fluorescein angiograms: ETDRS report number 11. Ophthalmology. 1991;98(5):807-822. Published online with permission from Ophthalmology/Copyright Clearance Center.