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LEA NUMBERS® cards 40 m / 60 m 52124
The Symbol :
272400
LEA NUMBERS® cards 40 m / 60 m
Kolor/Wzór
317.00
| The quantity in the package | 1 opak |
| Shipping within | 48 hours |
| Shipping price | 0 |
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Zamówienie telefoniczne: 22 651 82 85
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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
Instrukcja użytkowania
Przelicznik skali Decimal/Snellen
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