Fig. 1. ETDRS subfields within the standard 1-, 3-, and 6-mm diameter concentric circles used for reporting retinal thickness (central circle: fovea; inner ring: SI+NI+II+TI; outer ring: SO+NO+IO+TO). F = fovea; SI = superior inner; NI = nasal inner; II = inferior inner; TI = temporal inner; SO = superior outer; NO = nasal outer; IO = inferior outer; TO = temporal outer; ETDRS = Early Treatment of Diabetic Retinopathy Study.

J Retin 2024;9:10-7 https://doi.org/10.21561/jor.2024.9.1.10

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