Fig. 2From: Choroidal structural changes following vitrectomy performed with phacoemulsification in unilateral idiopathic epiretinal membraneImage binarization. A TCA was selected, and the image was adjusted by the auto-local threshold tool. The dark pixels represented the LA and the light pixels represented SA. B An overlay image of the ROI of the binarized segment on the original OCT scanBack to article page