ETDRS Low Contrast LEA NUMBERS® Charts
ETDRS low contrast LEA NUMBERS® vision chart with proportionally spaced (geometric progression) lines translucent low contrast letter chart with line sizes range from 20/200 to 20/10 (6/60 to 6/3) equivalent. Available in 2 contrast levels: 2.5% and 10%. Chart size is 24.5" x 25.5" (62 cm x 65 cm).
13 feet, 4 meters testing distance.
Note: This chart can only be used with our ESV3000 or ESC2000 illuminated ETDRS cabinet