Handheld vision test with LEA Symbols pediatric symbols features 50% spaced contour interaction bars to provide single optotype acuity with the proper crowding effect. Optotype line sizes from 20/100 to 20/20 (6/30 to 6/6) equivalent. This book can also be used for vision testing of illiterate adults or geriatric patients. Includes response key, flash cards, and instructions. 17 pages. 4″ x 4″ (10.2 cm x 10.2 cm).
Lea Symbols Book with Crowding Bars
10 feet, 3 meters testing distance
