• LEA SYMBOLS® SINGLE PRESENTATIONS FLASH CARD SET 52011

The Symbol : 252700

LEA SYMBOLS® SINGLE PRESENTATIONS FLASH CARD SET 30 szt

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This set of flashcards was designed for testing distance visual acuity in children and adults who have difficulty with visual acuity charts, the Crowded Symbol Book Test, or the Single Symbol Book Test. Line sizes range from 20/200 to 20/8 (6/60 to 6/2.4) equivalent, 0.10 to 2.50. Response key and instructions are included. 30 cards per set.

Dimensions: from 4" x 5" (10 cm x 12.7 cm) to 5" x 5" (12.7 cm x 12.7 cm).

Testing distance: 10 feet/3 meters.


Przykładowe badanie z kartami LEA :  https://www.good-lite.com/instructions/252700.cfm

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PDF DocumentPrzelicznik skali Decimal/Snellen

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