Sloan Letters Super Pinhole Chart
Super Pinhole Macula charts are used to determine potential acuity before cataract surgery.
Sloan Letters chart with proportionally spaced (logMAR) lines; line sizes range from 20/100 to 20/20 (6/30 to 6/6) equivalent. Sloan Letters Super Pinhole chart measures 10" x 10" (25.4cm x 25.4cm)
Testing distance of 5ft (1.5 m) for all Super Pinhole charts.