The Single Symbol Book is ideal for people who cannot perform when tested with a line test. This book can help determine the best resolution of the visual pathway in a child/adult with amblyopia or impaired vision. Single optotype line sizes from 20/200 to 20/8 (6/60 to 6/2.4) equivalent.
Lea Symbols Single Symbol Book
Includes: isolating mask, response key, flash cards, and instructions.
13 pages, 5″ x 5″ (12.7 cm x 12.7 cm)
10 feet, 3 meters testing distance
