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Logmar Charts | LogMar 4m ETDRS Chart 2 Revised
Product code | A11012
LogMar 4m ETDRS Chart 2 Revised
- Will fit illuminated cabinets SDT-392-LSV and SDT-396-LPV.
- These revised charts incorporate a slight change in the difficulty score for each of the ten Sloan letters derived from the best 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 ten letters are represented at least once in every position.
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Pattisson House
Addison Road, Chesham
Buckinghamshire HP5 2BD
UK
Email:
carleton@carletonltd.comSales:
01494 775 811
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