Notations for testing at 40 cm (16 in.)
Measures 9.5 X 16 cm (3.75 X 6.25 in.)
Protective coating allows washing or cleaning with alcohol without any damage to chart faces.
Acuity range 6.3M to .20M (20/320, 6/48 to 20/10, 6/3 equiv.)
Acuity range 3.2M to .20M (20/160, 6/48 to 20/10, 6/3 equiv.)
PV Numbers adhere to Sloan Optotype standards
Used for testing in multiple languages
MassVat format help to isolate optotypes for easier testing
PV Numbers optotypes are highly calibrated to Sloan optotypes and are considered reliable and accurate. PV Numbers are great for universal testing with patients that are not familiar with the Roman alphabet. PV Number Near Point card is great for screening vision in multiple countries.