Sloan Letter Proportionally Spaced Distance Chart
Sloan Letter translucent distance eye chart with proportionally spaced (logMAR) lines; line sizes range from 20/80 to 20/10. Lines are labeled with 20' notations only. This chart can either be wall mounted or used in an ESV1200, ESV1500, or a Model A+ illuminated cabinet. Chart size is 9" x 14" (22.9 cm x 35.6 cm)
20 feet, 6 meters testing distance.