Color-discrimination threshold determination using pseudoisochromatic test plates | Semantic Scholar
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
AO Plates | Young Expressions
HRR Colour Vision Test - Colour Vision Test - Kay Pictures
HRR 4th Edition Pseudoisochromatic Test – Ophthalmic Malaysia
HRR Colour Vision Test - Colour Vision Test - Kay Pictures
HRR Standard Pseudoisochromatic Test, 4th Edition – Good-Lite