ETDRS Low Contrast LEA NUMBERS® Clinical Trial Charts274200
ETDRS low contrast LEA NUMBERS® vision charts with proportionally spaced (geometric progression) lines. Features translucent low contrast letters with line sizes ranging from 13/131 to 13/5.2 (4/40 to 4/1.6) equivalent. The other equivalents featured on this chart are letter size, 20 foot, 6 meter, decimal, and LogMAR. Available in 2 contrast levels: 2.5% and 10%.
Dimensions: Height 24.5" x Width 25.5" (62 cm x 65 cm).
Testing distance: 13 feet/4 meters.