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2000 series revised ETDRS Translucent Charts

Products2000 series revised ETDRS Translucent Charts
Company Precision Vision, Ltd.
Item 2000 series revised ETDRS Translucent Charts
Features Optotypes in Logmar increments range in size from 40 M (4/40, 13/131 [6/60, 20/200 equiv., 0.10]) to 2 M (4/2, 13/6.5 [6/3, 20/10 equiv., 2.00]). Each chart fits large ETDRS illuminator cabinet and measures 62 x 65 cm (24.5 x 25.5 in) and can also be wall-mounted.
Description These revised charts incorporate the slight change in the difficulty score for each of the 10 Sloan letters derived from the best corrected visual acuity examinations of 7420 eyes during the ETDRS study. The original charts difficulty scores were derived from the examination of 234 eyes. In addition to the revised arrangement of letters which resulted in the ultimate homogeneity of difficulty per line, the three charts are balanced so that in each chart the 10 Sloan letters are represented at least once in every position.
Info Precision Vision, Ltd.
Customer Service: (800) 843-5367
Web site: http://www.precisionvision.com/index.htm

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