Tumbling E illiterate Chart by Barrier Free Access (HK) Limited Price US$74.9 Supplier/s Barrier Free Access (HK) Limited Supplier Code 500013 (IAPB) Country of Origin USA Request a quote Product Description R Standard – Letters ETDRS Chart (500013) Product Features Testing Distance = 4 m/ 13 feet Chart size: 24.5" x 25.5", 62 cm x 65 cm The chart fits all standardized ETDRS viewers. For Distance Visual Acuity Assessment Share: