ETDRS Low Contrast LEA NUMBERS® Clinical Trial Charts274200
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%.
Measurements: 24.5 in x 25.5 in (62 cm x 65 cm)
Test distance: 13 feet / 4 meters
Note: This chart can only be used with our ESV3000 or ESC2000 illuminated ETDRS cabinet.