Color Blindness

"Almost 10% of human males experience color vision deficiency (compared with 0.4% of females). The most common form of these abnormalities is characterized by an inability to distinguish between red and green hues. Instructions: The following images are part of The Series of Plates Designed as a Test for Colour-Deficiency by Shinobu Ishihara M.D. which is the accepted standardized color blindness test. They are specially adjusted to isolate the exact deficiency experienced by the viewer. What do you see in the plates?"

3 Questions