Landolt C ETDRS vision chart with proportionally spaced (geometric progression) lines; line sizes range from 20/200 to 20/10 (6/60 to 6/3) equivalent. Chart measures 24.5" x 25.5" (62 cm x 65 cm)
Landolt C openings are found at the up, down, left & right position only
10 feet, 3 meter testing distance
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