The 2000 Series Sloan Letter ETDRS vision chart 3 features proportionally spaced (geometric progression) lines; line sizes range from 20/200 to 20/10 (6/60 to 6/3) equivalent. Part of the revised ETDRS series with each line being equally difficult.
Dimensions: 24.5 in x 25.5 in (62 cm x 65 cm).
Testing distance: 10 feet/3 meters.
