CSV-1000 ETDRS, Letter Chart R

The ETDRS, test is now the US standard for evaluating LogMAR acuity. The CSV-1000 ETDRS, Chart R test face provides standardized testing of ETDRS, acuity. The CSV-1000 is the only instrument in which ETDRS, acuity can be tested at the standardized light level of 85 cd/m².