Pelli Robson Contrast Sensitivity Chart
Developed by Dr D Pelli of Syracuse University, New York and Dr J Robson of University of Cambridge, England. The Pelli-Robson chart utilises letters of the same size but with reducing contrast to provide a quick means of assessing patient contrast sensitivity thresholds. For use at one metre. Two charts are supplied printed with a different sequence of letters, together with instructions for use and a scoring pad. Height: 97cm, Width: 82cm. Recommended lighting requirement: approximately 913 Lux or 85 cd's m."