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  Indian J Med Microbiol
 

Figure 1 Early-treatment diabetic retinopathy study (ETDRS) layout area and nine sectors of the ETDRS layout: C, central subfield; I1, inferior inner macula; I2, inferior outer macula; N1, nasal inner macula; N2, nasal outer macula; S1, superior inner macula; S2, superior outer macula; T1, temporal inner macula; T2, temporal outer macula.

Figure 1 Early-treatment diabetic retinopathy study (ETDRS) layout area and nine sectors of the ETDRS layout: C, central subfield; I1, inferior inner macula; I2, inferior outer macula; N1, nasal inner macula; N2, nasal outer macula; S1, superior inner macula; S2, superior outer macula; T1, temporal inner macula; T2, temporal outer macula.