The CSV-1000ETDRS allows standardized testing of ETDRS acuity at 85 cd/m2, the light level recommended by the FDA for vision testing. Many tests are available, including ETDRS Chart R, Chart 1 and Chart 2.
The CSV-1000ETDRS is smaller than other backlit systems for ETDRS testing and allows testing 20/10 to 20/200 at a distance of 8 feet or 20/5 to 20/100 at a distance of 4 meters. It is perfect for examination room use, where a 4 meter test distance is not available, or for clinical trials where testing beyond 20/100 is not needed, such as refractive surgery or IOL trials. Reversed ETDRS tests are also available for testing at a distance of 4 meters with a mirror.