About
These five LEA SYMBOLS® 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 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
These five LEA SYMBOLS® 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 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
Resources & Downloads
Cards: LEA SYMBOLS® Cards 40M and 60M
- Regular price
- $60.50
- Sale price
- $60.50
- Regular price
-
$60.50
SKU: 256100
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CE Approved
About
These five LEA SYMBOLS® 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 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
These five LEA SYMBOLS® 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 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