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  • LEA NUMBERS® cards 40 m / 60 m 52124

The Symbol : 272400

LEA NUMBERS® cards 40 m / 60 m

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317.00
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The quantity in the package 1 opak
Delivery time to 20 days
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Zamówienie telefoniczne: 22 651 82 85

These five LEA NUMBERS® Cards can be used for presentation as single optotypes or arranged in a row as a line test. When the cards are next to each other, the space between the numbers is equal to the width of the symbols. To determine the visual acuity, use the following formula:

VA = Viewing Distance Used (meters) / M-value

Dimensions: 60M cards are approx. 6" x 9" (15.25 cm x 22.9 cm). 40M cards are approx. 4" x 6" (10.2 cm x 15.25 cm).

Testing distance: 40"/1 meter.

Click here for the 272400 Guide.

LEA SYMBOLS®: The Gold Standard



 PDF DocumentInstrukcja użytkowania

 
 PDF DocumentPrzelicznik skali Decimal/Snellen
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