• LEA SYMBOLS® cards 40 m / 60 m 52117

The Symbol : 256100

LEA SYMBOLS® cards 40 m / 60 m

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The Weight Of The 0.15 kg

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Cards can be used for presentations as individual optotypes, or for laying in a row. When the cards are in a row, the space between the optotypes is equal to the width of the optotypes. Made of washable plastic.
To establish visual acuity, use the following formula:
VA=Viewing Distance Used (meters)/M-wartość

5 cards each, can be used as individual symbols or placed in a row,
  Size 60 m Cards: approx. 21.9 cm x 21.9 cm,
  Size 40 m Cards: approx. 15.25 cm x 15.25 cm,
  Good-Lite: 256100

PDF DocumentPrzelicznik skali Decimal/Snellen. 

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