Fig. 5From: Portable acuity screening for any school: validation of patched HOTV with amblyopic patients and Bangerter normalsReceiver-operator characteristic (ROC) curve for surround HOTV flip card and test box screening in amblyopic patients and in Bangerter foil blurred normal subjects. Amblyopia is defined as E-ETDRS visual acuity of 20/40 or worse. Points on the curve correspond to passing that given level of HOTV visual acuity with at least 3 of 4 correctBack to article page