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This Sloan Letters Chart is for the Super Pinhole Macula Cabinet and has characters in a scrambled order for situations where repetitive testing are involved. Proportionally spaced lines; line sizes range from 20/100 to 20/20 (6/30 to 6/6) equivalent. 1.5m/5ft testing distance.
Super Pinhole Macula Charts are used to determine potential acuity before cataract surgery. Chart measures 10″ x 10″ (25.4cm x 25.4cm)