The Snellen eye chart is for vision testing at 3 meters (10 feet). Visual acuity range 20/100 to 20/16.
The Sloan eye chart is for vision testing at 6.1 meters (20 feet). Visual acuity range 20/100 to 20/16.
The Snellen and Sloan eye chart by Gima include red and green color bars for an easy and helpful visual and acuity test.
The dimensions of eye chart is 23 X 35.5 cm.
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