8 Position Landolt C ETDRS Chart for ESV3000 and ESC2000 Sku(s): 500070 (Scrambled 1), 500071 (Scrambled 2) Description: 8 Position Landolt C chart with C openings at up, down, left, right and each 45º angle. Landolt Tumbling C ETDRS vision testing chart with proportionally spaced (geometric progression) lines; line sizes range from 20/200 to 20/10 (6/60 to 6/3) equivalent. Landolt Tumbling C chart is available in 2 scrambled version for those that are performing repetitive vision testing. Chart measures 24.5" x 25.5" (62 cm x 65 cm). 13 feet, 4 meter testing distance.