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 a response key and instructions. 17 pages.
Measurements: 4 in x 4 in (10.2 cm x 10.2 cm).
Test distance: 10 feet/3 meters
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