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LEA SYMBOLS® Crowding Bar Book in 2.5% Contrast Set

 

LEA SYMBOLS® Crowding Bar Book in 2.5% Contrast Set

Handheld vision test with LEA SYMBOLS® pediatric symbols features 50% spaced contour interaction bars at 2.5% contrast 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 and instructions. 17 pages. 4" x 4" (10.2 cm x 10.2 cm).

10 feet, 3 meters testing distance.

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259225 $105.00

 

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