Fig. 1From: Portable acuity screening for any school: validation of patched HOTV with amblyopic patients and Bangerter normalsAlaskan school nurse using the ABCD surround, HOTV flip card critical line with matching card on a child wearing a “No Peeking Eye Patch” to assure sensitive, monocular visual acuity screening. Ten foot (3 meter) testing distance assured by accompanying beaded cord- on the floorBack to article page