with 50% Crowding Bars to provide single optotype acuity with the proper crowding effect - sizes range from 20/100 to 20/16 (6/30 to 6/4.8) equivalent, 0.20 to 1.25 - 13 feet/4 meters testing distance [Full description below...]
Description
with 50% Crowding Bars to provide single optotype acuity with the proper crowding effect - sizes range from 20/100 to 20/16 (6/30 to 6/4.8) equivalent, 0.20 to 1.25 - 13 feet/4 meters testing distance