Color test plates on page 18: Reproduced with permission from the Pseudoisochromatic Plate Ishihara Compatible (PIPIC) Color Vision Test 24 Plate Edition by Dr. Terrace L.
Testkujundid lk 18: Loa andnud: Pseudoisochromatic Plate Ishihara Compatible (PIPIC) Color Vision Test 24 Plate Edition by Dr Terrace L.