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LEA Symbols ETDRS distance chart with proportionally spaced (logMAR); line sizes range from 20/200 to 20/8 (6/60 to 6/2.4) equivalent, 0.10 to 2.50 - includes response key, training cards - 10 feet/3 meters testing distance - chart measures 24.5" x 25.5" (62 cm x 65 cm)