Cards: LEA SYMBOLS® Cards 40M and 60M

Good-Lite Co Verified independent store

→

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 sym bols is equal to the width of the symbols. To determine the visual acuity, use the following formula: VA = Viewing Distance Used(meters) / M-value Show more