This test is the most commonly used test in the health care of children at the age of 3 to 4 years and in amblyopia screening in many countries. Proportionally spaced (logMAR); line sizes range from 20/200 to 20/16 (6/60 to 6/4.8) equivalent, 0.25 to 1.25. The 20/160 (6/48) and 20/100 (6/30) lines have been omitted. The reverse side is black and can be used as the test surface for the color vision test (#260260). Has a hole for hanging the chart on the wall. Includes response key, training cards, and instructions. 16 x 16 (40.6 cm x 40.6 cm). Folds to 16 x 8 (40.6 cm x 20.3 cm). 10 feet/3 meters testing distance.