Sloan Letter Linear-spaced Distance Chart
Sloan Letter distance eye chart with linear-spaced lines; line sizes range from 20/160 to 20/16 (6/48 to 6/4.8) equivalent, 0.12 to 1.25. This chart can be used in Good-Lite's illuminated ESV1018 or hung on the wall. Chart size is 10"x18" (25.4 cm x 45.7 cm).
10 feet, 3 meters testing distance.