2.5% ETDRS Sloan Letter Contrast Chart for 13 feet (4 meters)

A Sloan Letter ETDRS contrast chart with 2.5% contrast and proportionally spaced (logMAR) lines; line sizes range from 13/131 to 13/6.5 (4/40 to 4/2 equivalent) with letter size, 20 foot, 6 meter, LogMar, and decimal notations. These charts fit in the ESV3000 ETDRS Standardized Viewer and ESC2000 Illuminated Cabinet.

Dimensions: Height 24.5" x Width 25.5" (62 cm x 65 cm).

Testing distance: 13 feet/4 meters.

Click here for the 500120 Answer Key.