Chart(Distance): ESV3000™ and ESC2000™ - ETDRS - Sloan Letter Low Contrast

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ETDRS low contrast Sloan Letter vision charts with proportionally spaced (geometric progression) lines. Features translucent low contrast letters with line sizes ranging from 13/13 1 to 13/6.5 (4/40 to 4/2) equivalent.The other equivalents featured on these charts are letter size, 20 foot, 6 meter, decimal, and LogMAR. Available in 5 contrast levels: 1.25%, 2.5%, 5%, 10% and 25%. Note: These charts can only be used with our ESV3000™ or ESC2000™ illuminated ETDRS cabinets. Additional Resources Click here for the 500020 Answer Key. Click here for the 500021 Answer Key. Click here for the 500022 Answer Key. Show more