5% ETDRS Sloan Letter Contrast Chart for 10 feet (3 meters)500028
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A 5% Contrast Sloan Letter vision chart with proportionally spaced (geometric progression) lines; line sizes range from 10/100 to 10/5 (3/30 to 3/1.5) equivalent. The other equivalents featured on this chart are letter size, 20 foot, 6 meter, decimal, and LogMAR. This chart is part of the revised versions of the original ETDRS series with each line being equally difficult.
ESV3000 ETDRS Clinical Trial Standardized Viewer and ESC2000 Illuminated ETDRS Clinical Trial Cabinet compatible.
Dimensions: Height 24.5" x Width 25.5" (62 cm x 65 cm).
Testing distance: 10 feet/3 meters.