LEA NUMBERS Cards, 40M and 60M – 272400

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.

Description

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

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).

Reviews

There are no reviews yet.

Be the first to review “LEA NUMBERS Cards, 40M and 60M – 272400”

Your email address will not be published. Required fields are marked *