Detect amblyopia and vision loss in your own family with this free downloadable vision screening kit. Calibrated to match PEDIG amblyopia acuity presentation, the symmetric letters have surround bars to catch amblyopia. The matching card allows pre-literate, and non-English language, world-wide screening for children and adults. Critical line for pre-Kindergarten and also for older than Kindergarten ages. Patching precludes peeking. ABCD-Vision.org.