Figure 2 Choroidal thickness in eyes of different study groups. (a) Eyes with diabetic macular edema, (b) eyes of diabetic patients without retinopathy, and (c) eyes of normal participants. Left: B-scan OCT with autosegmentation of the choroid. Right: choroidal thickness map according to early-treatment diabetic retinopathy study (ETDRS) grid. OCT, optical coherence tomography.