Optometric ETDRS Visual Acuity Charts

CompanyPrecision Vision®Precision Vision®Precision Vision®Precision Vision®Precision Vision®
Item4 Meter 2000 Series Revised ETDRS Chart "3"4 Meter 2000 Series Revised ETDRS Chart "1"4 Meter 2000 Series Revised ETDRS Chart "2"4 Meter Original Series ETDRS Chart "1"4 Meter Original Series ETDRS Chart "2"
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Testing Distance4 meters (13 ft.)4 meters (13 ft.)4 meters (13 ft.)4 meters (13 ft.)4 meters (13 ft.)
Chart Number31212
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DescriptionETDRS "2000" Series charts utilize a geometric progression from line to line. Each optotype on the chart is proportionally spaced. By using these types of progression and spacing the chart becomes balanced and equal. This give the patient a well This "revised" ETDRS chart incorporates a slight change in difficulty score for each of the ten Sloan optotypes. These difficulty levels were derived from the best corrected visual acuity examinations of 7,420 eyes during the ETDRS study. The Similar to the "Original" Series ETDRS chart, this revised version features the use of three separate charts for the testing of each patient's eyes separately and together. Each of the three ETDRS charts feature a different configuration of ETDRS charts use a series of three charts with different permutations of optotypes. ETDRS "Chart 1" is used to test the right eye's acuity. ETDRS "Chart 2," and "Chart R" are used to test the visual acuity in the left eye and both eyes, respectivelyETDRS chart features equivalents listed on both the right and left sides of the acuity chart. These equivalents include feet, meters, decimal, and LogMar. This ETDRS acuity test is calibrated for testing at 4 meters. However, acuity results can be
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