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Self-Testing Binary Choice: PRESS Yes.. When C's are oriented the same; PRESS No.. When C's are oriented differently.
Tutorial slideshow
STARTING SCREEN
Choose "C" to Use Landolt C Letters
Are the "Cs" the SAME? YES
The Opening in TOP C is in the same location as the Opening in the BOTTOM C.
Are the "Cs" the SAME? NO
The opening in the Cs are in DIFFERENT Positions.
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