Sloan Letter Reversed Distance Charts800739
Reversed Sloan Letter optotypes in proportionally spaced (logMAR) lines; line sizes range from 20/100 to 20/16 (6/30 to 6/4.8). This chart can be used in an illuminated ESV1018 cabinet or hung on the wall. Chart size is 10 in x 18 in (25.4 cm x 45.7 cm).
20 feet, 6 meters testing distance.