Pseudo-Isochromatic Plates for Color Perception, American Opical Company, 1st Ed. [1940]. *Note: The aging of this book & potential ink/page discolouration is not suitable for current testing standards. Posted as a historical
HRR Computerised Color Vision Test - YouTube
HRR Pseudoisochromatic Plates
Computerized and Non-Computerized Colour Vision Tests | Semantic Scholar
HRR 4th Edition Pseudoisochromatic Test - English Instruction Version from Good-Lite (Formerly Richmond Products, Inc.) - Product Description and Details
Frontiers | Color-discrimination threshold determination using pseudoisochromatic test plates