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
Dimensions: 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).
Testing distance: 40"/1 meter.
Note: All products sold on Accuspire.com should be used by qualified clinician and should be purchased by or on order of a qualified clinician.
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...
This Low Vision book with LEA NUMBERS® is designed for testing severely visually impaired children and adults. This complete book includes testing at 10 ft (3 meters), 5 ft (1.5 meters) and for...
This chart featuring LEA NUMBERS® is designed to measure visual acuity with a standard line test and with three tighter spaced tests; 50%, 25%, and 12.5% which often reveal difficulties in...
This test is designed for testing children and adults with visual impairment at a distance of one meter. The LEA NUMBERS® in this assessment tool include the largest numbers, 50M in size,...
This low vision book with LEA SYMBOLS® pediatric optotypes is designed for testing severely visually impaired children and adults. The complete book includes testing at 10 ft (3 meters), 5 ft (1...
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