Sloan Letter Proportionally Spaced Distance Chart
Sloan Letter translucent distance eye chart with proportionally spaced lines; line sizes range from 20/160 to 20/10 (6/48 to 6/3) equivalent. This chart can either be wall mounted or used in an ESV1200, ESV1500, or a Model A+ illuminated cabinet.
10 feet, 3 meters testing distance.