Chart(Distance): ESV3000™ and ESC2000™ - ETDRS 2000 Series - Sloan Letter - Chart 1 (13ft/4m)

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The 2000 Series Sloan Letter ETDRS vision chart 1 eye chart with proportionally spaced (geometric progression) lines; line sizes range from 13/131 to 13/6.5 (4/40 to 4/2) equivalen t. The other equivalents featured on this chart are letter size, 20 foot, 6 meter, decimal, and LogMar. Part of the revised ETDRS series with each line being equally difficult. ESV3000™ ETDRS Clinical Trial Standardized Viewer and ESC2000™ Illuminated ETDRS Clinical Trial Cabinet compatible. Show more