LEA SYMBOLS® ETDRS Translucent Distance Charts (13 feet/4 meters)253333
LEA SYMBOLS® ETDRS,. 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 and instructions. Screen printed on styrene plastic for long-lasting durability.
Measurements: 24.5 in x 25.5 in (62cm x 65cm)
Test distance: 13 feet/4 meters