Fig. 2From: Changes in choroidal thickness in advanced diabetic retinopathy treated with pan-retinal photocoagulation using a pattern scanning laser versus a conventional laserComparisons of the changes and reduction in mean subfoveal choroidal thickness (SFChT) after pan-retinal photocoagulation between the PDR and severe NPDR groups. a Comparison of changes in mean SFChT between the two groups. b Comparison of the reduction in SFChT between the two groups. The PDR group showed a more prominent reduction than the severe NPDR group at 12 months after pan-retinal photocoagulation. ΔSFChT, reduction of SFChT = SFChT at baseline – SFChT at time point. PDR, proliferative retinopathy; NPDR, non-proliferative retinopathy *P = 0.006Back to article page