The ETDRS test is now the US standard for evaluating LogMAR acuity. This CSV1000 ETDRS chart test provides standardized testing of ETDRS acuity.This chart can only be used in the CSV1000 Test Instrument Viewer and the CSV1000 Test Instrument Viewer. These instruments can test at the standardized light level of 85 cd/m2.
Dimensions: Width 19.5″ x Height 17.5″ (49.53 cm x 44.45 cm).