LEA SYMBOLS® ETDRS Chart for 13ft/4m. Proportionally spaced (logMAR) lines; line sizes range from 20/160 to 20/8 (6/48 to 6/2.4) equivalent, 0.90 to 2.50. Includes response key, training cards, and instructions.

Chart size is 24.5" x 25.5" (62cm x 65cm) and screen printed on styrene plastic for long lasting durability. Includes both flash cards and response panel.

13ft/4 meters testing distance.