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

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An Original series ETDRS vision chart that can be displayed in the ESV3000™ or ESC2000™ light boxes. This chart features proportionally spaced (geometric progression) lines; line s izes range from 13/131 to 13/6.5 (4/40 to 4/2) equivalent. The other equivalents featured on this chart are letter size, 20 foot, 6 meter, decimal, and LogMAR. Features the standardized format used in National Eye Institute clinical studies and in low vision evaluations that require accurate and repeatable visual acuity measurements. Available in 2 different versions: The Standard ETDRS style chart is printed on .01 thick styrene plastic making the chart more rigid. The Roll-Up ETDRS style chart is printed on .015 thick styrene plastic allowing the chart to be rolled up for easy transporting or storage. Both are UV coated for long-lasting durability. Show more