Modified ETDRS with Sloan letters in Snellen equivalents, features a guide for selecting dioptic power of reading add based on test results at two distances. Acuity range differs depending on distance. Two-sided with different optotypes on each side, includes 40cm (16in) cord for proper viewing distance and measures 18x23cm (7x9in).
|List Price (Product Availability)||Available through Eye Care Professionals Only.|
|Size (in)||7in by 9in|
|Size (cm)||18cm by 23cm|
|Distance (m)||40 centimeters|