Sloan Letter Distance Chart by Barrier Free Access (HK) Limited Price US$31.5 Supplier/s Barrier Free Access (HK) Limited Supplier Code 600705 (IAPB) Country of Origin USA Request a quote Product Description Sloan Letter Proportionally Spaced Distance Chart (600705) Product Features Testing Distance = 3 m/ 10 feet This chart can either be wall mounted or used in an ESV1200 or Model A+ illuminated cabinet. For Distance Visual Acuity Assessment Share: