The Trans-Illuminated Pelli-Robson Contrast Sensitivity Chart #3 is to be utilized in either the 914 or 930 Precision Vision Small Illuminator Cabinet.

Unlike similar products, The Pelli-Robson Chart has been trusted for decades in research and clinical trials. It is also mentioned exponentially more in the National Library of Medicine than any similar product.

The Gold Standard is manufactured exclusively by Precision Vision, Inc.