ETDRS Visual Acuity Charts

CompanyPrecision Vision®Precision Vision®
Item4 Meter 2000 Series Revised ETDRS Chart "1"4 Meter 2000 Series Revised ETDRS Chart "3"
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DescriptionThis "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 ETDRS "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
Features
  • For testing at 4 meters (13 ft.)
  • Acuity range 40M to 2M (20/200, 6/60 to 20/10, 63 equiv.)
  • Measures 62 X 65 cm (24.5 X 25.5 in.)
  • Fits ETDRS Illuminator Cabinet CAT. NO. 2425
  • Can also be wall-mounted
  • Printed on high-impact polystyrene
  • This "revised" chart incorporates a slight change in the difficulty score for each of the ten SLOAN letters derived from the best corrected visual acuity examinations of 7,420 eyes during the ETDRS study.
  • For testing at 4 meters (13 ft.)
  • Acuity range 40M to 2M (20/200, 6/60 to 20/10, 63 equiv.)
  • Measures 62 X 65 cm (24.5 X 25.5 in.)
  • Fits ETDRS Illuminator Cabinet CAT. NO. 2425
  • Can also be wall-mounted
ApprovalUSAInquire
Product Number21212123
Chart Number13
Testing Distance4 meters (13 ft.)4 meters (13 ft.)
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