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

An original series ETDRS eye chart with proportionally spaced (geometric progression) lines; line sizes 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. The Standard version is ESV3000™ ETDRS Clinical Trial Standardized Viewer and ESC2000™ Illuminated ETDRS Clinical Trial Cabinet compatible.   Additional Resources Click here for the 500013 answer key Click here for the ETDRS Guide. What is ET