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Good-Lite LEA Numbers Cards, 40M and 60M
These five LEA Symbols Cards can be used for presentation as single ototypes or arranged in a row as a line test. In situations where the cards are next to each other, the space between the symbols is equal to the width of the symbols. To determine the visual acuity use the following formula: VA=Viewing Distance Used(meters)/M-value.
- 60M cards are approx. 8.6" x 8.6" (21.9 cm x 21.9 cm).
- 40M cards are approx. 6" x 6" (15.25 cm x 15.25 cm).
|Type of product||Eye Chart|
|Minimum Shipping latency||3|